diff --git a/src/app/app.pro b/src/app/app.pro
index 46934156a..ff1c73884 100644
--- a/src/app/app.pro
+++ b/src/app/app.pro
@@ -144,10 +144,6 @@ CONFIG(debug, debug|release){
     DEFINES += "LOC_REV=0"
 }else{
     # Release
-    *-g++{
-    QMAKE_CXXFLAGS += -O2
-    }
-
     DEFINES += QT_NO_DEBUG_OUTPUT
 
     #local revision number for using in version
diff --git a/src/libs/qmuparser/qmuparser.pro b/src/libs/qmuparser/qmuparser.pro
index d2651f04d..c60eb473a 100644
--- a/src/libs/qmuparser/qmuparser.pro
+++ b/src/libs/qmuparser/qmuparser.pro
@@ -105,9 +105,5 @@ CONFIG(debug, debug|release){
 
 }else{
     # Release
-    *-g++{
-    QMAKE_CXXFLAGS += -O2
-    }
-
     DEFINES += QT_NO_DEBUG_OUTPUT
 }
diff --git a/src/libs/vpropertyexplorer/vpropertyexplorer.pro b/src/libs/vpropertyexplorer/vpropertyexplorer.pro
index b45f272e0..e2fea1fbc 100644
--- a/src/libs/vpropertyexplorer/vpropertyexplorer.pro
+++ b/src/libs/vpropertyexplorer/vpropertyexplorer.pro
@@ -148,9 +148,5 @@ CONFIG(debug, debug|release){
 
 }else{
     # Release
-    *-g++{
-    QMAKE_CXXFLAGS += -O2
-    }
-
     DEFINES += QT_NO_DEBUG_OUTPUT
 }