diff --git a/mkspecs/win32-msvc2013/qmake.conf b/mkspecs/win32-msvc2013/qmake.conf
index 6e0bd0b214d..535904a8f9c 100644
--- a/mkspecs/win32-msvc2013/qmake.conf
+++ b/mkspecs/win32-msvc2013/qmake.conf
@@ -25,8 +25,8 @@ QMAKE_YACCFLAGS         = -d
 QMAKE_CFLAGS            = -nologo -Zm200 -Zc:wchar_t -FS
 QMAKE_CFLAGS_WARN_ON    = -W3
 QMAKE_CFLAGS_WARN_OFF   = -W0
-QMAKE_CFLAGS_RELEASE    = -O2 -MD
-QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO += -O2 -MD -Zi
+QMAKE_CFLAGS_RELEASE    = -O2 -MD -Zc:strictStrings
+QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO += -O2 -MD -Zi -Zc:strictStrings
 QMAKE_CFLAGS_DEBUG      = -Zi -MDd
 QMAKE_CFLAGS_YACC       =
 QMAKE_CFLAGS_LTCG       = -GL