diff --git a/libbitdht/src/libbitdht.pro b/libbitdht/src/libbitdht.pro
index cb96208e5..cb2f3b4b0 100644
--- a/libbitdht/src/libbitdht.pro
+++ b/libbitdht/src/libbitdht.pro
@@ -66,16 +66,6 @@ win32 {
 		# Switch on extra warnings
 		QMAKE_CFLAGS += -Wextra
 		QMAKE_CXXFLAGS += -Wextra
-
-		# Switch off optimization for release version
-		QMAKE_CXXFLAGS_RELEASE -= -O2
-		QMAKE_CXXFLAGS_RELEASE += -O0
-		QMAKE_CFLAGS_RELEASE -= -O2
-		QMAKE_CFLAGS_RELEASE += -O0
-
-		# Switch on optimization for debug version
-		#QMAKE_CXXFLAGS_DEBUG += -O2
-		#QMAKE_CFLAGS_DEBUG += -O2
 }
 
 ################################# MacOSX ##########################################
diff --git a/libretroshare/src/libretroshare.pro b/libretroshare/src/libretroshare.pro
index 1d7ac0863..9383e592f 100644
--- a/libretroshare/src/libretroshare.pro
+++ b/libretroshare/src/libretroshare.pro
@@ -275,16 +275,6 @@ win32 {
 	QMAKE_CFLAGS += -Wextra
 	QMAKE_CXXFLAGS += -Wextra
 
-	# Switch off optimization for release version
-	QMAKE_CXXFLAGS_RELEASE -= -O2
-	QMAKE_CXXFLAGS_RELEASE += -O0
-	QMAKE_CFLAGS_RELEASE -= -O2
-	QMAKE_CFLAGS_RELEASE += -O0
-
-	# Switch on optimization for debug version
-	#QMAKE_CXXFLAGS_DEBUG += -O2
-	#QMAKE_CFLAGS_DEBUG += -O2
-
 	DEFINES += USE_CMD_ARGS
 
 	#miniupnp implementation files
diff --git a/plugins/Common/retroshare_plugin.pri b/plugins/Common/retroshare_plugin.pri
index 83af5c9c9..06385b858 100644
--- a/plugins/Common/retroshare_plugin.pri
+++ b/plugins/Common/retroshare_plugin.pri
@@ -23,16 +23,6 @@ win32 {
 	DEFINES += MINIUPNPC_VERSION=13
 #	DESTDIR = lib
 
-	# Switch off optimization for release version
-	QMAKE_CXXFLAGS_RELEASE -= -O2
-	QMAKE_CXXFLAGS_RELEASE += -O0
-	QMAKE_CFLAGS_RELEASE -= -O2
-	QMAKE_CFLAGS_RELEASE += -O0
-
-	# Switch on optimization for debug version
-	#QMAKE_CXXFLAGS_DEBUG += -O2
-	#QMAKE_CFLAGS_DEBUG += -O2
-
 	DEFINES += USE_CMD_ARGS
 
 	#miniupnp implementation files
diff --git a/retroshare-gui/src/retroshare-gui.pro b/retroshare-gui/src/retroshare-gui.pro
index 4a6223bd1..a5fcc9153 100644
--- a/retroshare-gui/src/retroshare-gui.pro
+++ b/retroshare-gui/src/retroshare-gui.pro
@@ -109,16 +109,6 @@ win32 {
 	QMAKE_CFLAGS += -Wextra
 	QMAKE_CXXFLAGS += -Wextra
 
-	# Switch off optimization for release version
-	QMAKE_CXXFLAGS_RELEASE -= -O2
-	QMAKE_CXXFLAGS_RELEASE += -O0
-	QMAKE_CFLAGS_RELEASE -= -O2
-	QMAKE_CFLAGS_RELEASE += -O0
-
-	# Switch on optimization for debug version
-	#QMAKE_CXXFLAGS_DEBUG += -O2
-	#QMAKE_CFLAGS_DEBUG += -O2
-
 	OBJECTS_DIR = temp/obj
 	#LIBS += -L"D/Qt/2009.03/qt/plugins/imageformats"
 	#QTPLUGIN += qjpeg