diff --git a/rtengine/rtthumbnail.cc b/rtengine/rtthumbnail.cc
index 95b1a24c9..65c03ac96 100644
--- a/rtengine/rtthumbnail.cc
+++ b/rtengine/rtthumbnail.cc
@@ -100,7 +100,7 @@ void adjustBlackLevels(float cblack[4], rtengine::eSensorType sensorType, const
             break;
     }
 
-    for (int i = 0; i < black_adjust.size(); i++) {
+    for (unsigned int i = 0; i < black_adjust.size(); i++) {
         cblack[i] = std::max(0.f, cblack[i] + black_adjust[i]);
     }
 }
@@ -118,7 +118,7 @@ void calculate_scale_mul(float scale_mul[4], const float pre_mul_[4], const floa
 {
     std::array<float, 4> c_white;
 
-    for (int i = 0; i < c_white.size(); ++i) {
+    for (unsigned int i = 0; i < c_white.size(); ++i) {
         c_white[i] = static_cast<float>(ri->get_white(i));
     }
 
diff --git a/rtengine/simpleprocess.cc b/rtengine/simpleprocess.cc
index ad0ce9cc0..b5c5cdcdd 100644
--- a/rtengine/simpleprocess.cc
+++ b/rtengine/simpleprocess.cc
@@ -287,7 +287,6 @@ private:
         int kmin  = 20;
         float minhist = 1000000000.f;
         float maxhist = -1000.f;
-        double tempitc = 5000.f;
         double greenitc = 1.;
         float temp0 = 5000.f;
         bool extra = false;