diff --git a/rtengine/guidedfilter.cc b/rtengine/guidedfilter.cc
index 283da100c..bed4d8be7 100644
--- a/rtengine/guidedfilter.cc
+++ b/rtengine/guidedfilter.cc
@@ -90,7 +90,12 @@ void guidedFilter(const array2D<float> &guide, const array2D<float> &src, array2
     enum Op { MUL, DIVEPSILON, ADD, SUB, ADDMUL, SUBMUL };
 
     const auto apply =
-        [=](Op op, array2D<float> &res, const array2D<float> &a, const array2D<float> &b, const array2D<float> &c=array2D<float>()) -> void
+#ifdef _OPENMP
+        [multithread, epsilon](Op op, array2D<float> &res, const array2D<float> &a, const array2D<float> &b, const array2D<float> &c=array2D<float>()) -> void
+#else
+        // removed multithread to fix clang warning on msys2 clang builds, which don't support OpenMp
+        [epsilon](Op op, array2D<float> &res, const array2D<float> &a, const array2D<float> &b, const array2D<float> &c=array2D<float>()) -> void
+#endif
         {
             const int w = res.width();
             const int h = res.height();
diff --git a/rtengine/iplocallab.cc b/rtengine/iplocallab.cc
index b78409c0f..abe12884c 100644
--- a/rtengine/iplocallab.cc
+++ b/rtengine/iplocallab.cc
@@ -7345,7 +7345,8 @@ void ImProcFunctions::Lab_Local(int call, int sp, float** shbuffer, LabImage * o
             levred = 7;
             noiscfactiv = false;
         }
-
+//lastsav for save restore image
+        lastsav = 0;
 
         if (lp.excmet == 1  && call <= 3) {//exclude
             const int bfh = int (lp.ly + lp.lyT) + del; //bfw bfh real size of square zone