diff --git a/rtengine/improccoordinator.cc b/rtengine/improccoordinator.cc
index 52a1d10bc..4bd1f2f48 100644
--- a/rtengine/improccoordinator.cc
+++ b/rtengine/improccoordinator.cc
@@ -1410,7 +1410,39 @@ void ImProcCoordinator::process()
     paramsUpdateMutex.lock();
 
     while (changeSinceLast) {
-        const bool panningRelatedChange = params.isPanningRelatedChange(nextParams);
+        const bool panningRelatedChange =
+               params.toneCurve != nextParams.toneCurve
+            || params.labCurve != nextParams.labCurve
+            || params.localContrast != nextParams.localContrast
+            || params.rgbCurves != nextParams.rgbCurves
+            || params.colorToning != nextParams.colorToning
+            || params.vibrance != nextParams.vibrance
+            || params.wb != nextParams.wb
+            || params.colorappearance != nextParams.colorappearance
+            || params.epd != nextParams.epd
+            || params.fattal != nextParams.fattal
+            || params.sh != nextParams.sh
+            || params.crop != nextParams.crop
+            || params.coarse != nextParams.coarse
+            || params.commonTrans != nextParams.commonTrans
+            || params.rotate != nextParams.rotate
+            || params.distortion != nextParams.distortion
+            || params.lensProf != nextParams.lensProf
+            || params.perspective != nextParams.perspective
+            || params.gradient != nextParams.gradient
+            || params.pcvignette != nextParams.pcvignette
+            || params.cacorrection != nextParams.cacorrection
+            || params.vignetting != nextParams.vignetting
+            || params.chmixer != nextParams.chmixer
+            || params.blackwhite != nextParams.blackwhite
+            || params.icm != nextParams.icm
+            || params.hsvequalizer != nextParams.hsvequalizer
+            || params.filmSimulation != nextParams.filmSimulation
+            || params.softlight != nextParams.softlight
+            || params.raw != nextParams.raw
+            || params.retinex != nextParams.retinex
+            || params.dirpyrequalizer != nextParams.dirpyrequalizer;
+
         params = nextParams;
         int change = changeSinceLast;
         changeSinceLast = 0;
diff --git a/rtengine/procparams.cc b/rtengine/procparams.cc
index bee556b27..d8d6aee33 100644
--- a/rtengine/procparams.cc
+++ b/rtengine/procparams.cc
@@ -5048,73 +5048,6 @@ int ProcParams::write(const Glib::ustring& fname, const Glib::ustring& content)
     return error;
 }
 
-bool ProcParams::isThumbRelatedChange(const ProcParams &newParams) const
-{
-    return toneCurve != newParams.toneCurve
-        || labCurve != newParams.labCurve
-        || localContrast != newParams.localContrast
-        || rgbCurves != newParams.rgbCurves
-        || colorToning != newParams.colorToning
-        || vibrance != newParams.vibrance
-        || wb != newParams.wb
-        || colorappearance != newParams.colorappearance
-        || epd != newParams.epd
-        || fattal != newParams.fattal
-        || sh != newParams.sh
-        || crop != newParams.crop
-        || coarse != newParams.coarse
-        || commonTrans != newParams.commonTrans
-        || rotate != newParams.rotate
-        || distortion != newParams.distortion
-        || lensProf != newParams.lensProf
-        || perspective != newParams.perspective
-        || gradient != newParams.gradient
-        || pcvignette != newParams.pcvignette
-        || cacorrection != newParams.cacorrection
-        || vignetting != newParams.vignetting
-        || chmixer != newParams.chmixer
-        || blackwhite != newParams.blackwhite
-        || icm != newParams.icm
-        || hsvequalizer != newParams.hsvequalizer
-        || filmSimulation != newParams.filmSimulation
-        || softlight != newParams.softlight;
-}
-
-bool ProcParams::isPanningRelatedChange(const ProcParams &newParams) const
-{
-    return toneCurve != newParams.toneCurve
-        || labCurve != newParams.labCurve
-        || localContrast != newParams.localContrast
-        || rgbCurves != newParams.rgbCurves
-        || colorToning != newParams.colorToning
-        || vibrance != newParams.vibrance
-        || wb != newParams.wb
-        || colorappearance != newParams.colorappearance
-        || epd != newParams.epd
-        || fattal != newParams.fattal
-        || sh != newParams.sh
-        || crop != newParams.crop
-        || coarse != newParams.coarse
-        || commonTrans != newParams.commonTrans
-        || rotate != newParams.rotate
-        || distortion != newParams.distortion
-        || lensProf != newParams.lensProf
-        || perspective != newParams.perspective
-        || gradient != newParams.gradient
-        || pcvignette != newParams.pcvignette
-        || cacorrection != newParams.cacorrection
-        || vignetting != newParams.vignetting
-        || chmixer != newParams.chmixer
-        || blackwhite != newParams.blackwhite
-        || icm != newParams.icm
-        || hsvequalizer != newParams.hsvequalizer
-        || filmSimulation != newParams.filmSimulation
-        || softlight != newParams.softlight
-        || raw != newParams.raw
-        || retinex != newParams.retinex
-        || dirpyrequalizer != newParams.dirpyrequalizer;
-}
-
 PartialProfile::PartialProfile(bool createInstance, bool paramsEditedValue)
 {
     if (createInstance) {
diff --git a/rtengine/procparams.h b/rtengine/procparams.h
index db89754a7..0b8b5ba56 100644
--- a/rtengine/procparams.h
+++ b/rtengine/procparams.h
@@ -1488,9 +1488,6 @@ public:
     bool operator ==(const ProcParams& other) const;
     bool operator !=(const ProcParams& other) const;
 
-    bool isThumbRelatedChange(const ProcParams &newParams) const;
-    bool isPanningRelatedChange(const ProcParams &newParams) const;
-
 private:
     /** Write the ProcParams's text in the file of the given name.
     * @param fname the name of the file
diff --git a/rtgui/thumbnail.cc b/rtgui/thumbnail.cc
index 88cabe19d..0f0433878 100644
--- a/rtgui/thumbnail.cc
+++ b/rtgui/thumbnail.cc
@@ -419,7 +419,36 @@ bool Thumbnail::hasProcParams () const
 
 void Thumbnail::setProcParams (const ProcParams& pp, ParamsEdited* pe, int whoChangedIt, bool updateCacheNow)
 {
-    const bool needsReprocessing = pparams.isThumbRelatedChange(pp);
+    const bool needsReprocessing =
+           pparams.toneCurve != pp.toneCurve
+        || pparams.labCurve != pp.labCurve
+        || pparams.localContrast != pp.localContrast
+        || pparams.rgbCurves != pp.rgbCurves
+        || pparams.colorToning != pp.colorToning
+        || pparams.vibrance != pp.vibrance
+        || pparams.wb != pp.wb
+        || pparams.colorappearance != pp.colorappearance
+        || pparams.epd != pp.epd
+        || pparams.fattal != pp.fattal
+        || pparams.sh != pp.sh
+        || pparams.crop != pp.crop
+        || pparams.coarse != pp.coarse
+        || pparams.commonTrans != pp.commonTrans
+        || pparams.rotate != pp.rotate
+        || pparams.distortion != pp.distortion
+        || pparams.lensProf != pp.lensProf
+        || pparams.perspective != pp.perspective
+        || pparams.gradient != pp.gradient
+        || pparams.pcvignette != pp.pcvignette
+        || pparams.cacorrection != pp.cacorrection
+        || pparams.vignetting != pp.vignetting
+        || pparams.chmixer != pp.chmixer
+        || pparams.blackwhite != pp.blackwhite
+        || pparams.icm != pp.icm
+        || pparams.hsvequalizer != pp.hsvequalizer
+        || pparams.filmSimulation != pp.filmSimulation
+        || pparams.softlight != pp.softlight;
+
     {
         MyMutex::MyLock lock(mutex);