diff --git a/samples/cpp/cloning_gui.cpp b/samples/cpp/cloning_gui.cpp
index 07671ca8a6..668dd2a959 100644
--- a/samples/cpp/cloning_gui.cpp
+++ b/samples/cpp/cloning_gui.cpp
@@ -65,7 +65,7 @@ float alpha,beta;
 
 float red, green, blue;
 
-double low_t, high_t;
+float low_t, high_t;
 
 void source(int, int, int, int, void*);
 void destination(int, int, int, int, void*);
diff --git a/samples/cpp/tutorial_code/photo/seamless_cloning/cloning_gui.cpp b/samples/cpp/tutorial_code/photo/seamless_cloning/cloning_gui.cpp
index 6edeb3eadb..6ca79a7a04 100644
--- a/samples/cpp/tutorial_code/photo/seamless_cloning/cloning_gui.cpp
+++ b/samples/cpp/tutorial_code/photo/seamless_cloning/cloning_gui.cpp
@@ -64,7 +64,7 @@ float alpha,beta;
 
 float red, green, blue;
 
-double low_t, high_t;
+float low_t, high_t;
 
 void source(int, int, int, int, void*);
 void destination(int, int, int, int, void*);