diff --git a/mkspecs/win32-clang-g++/qmake.conf b/mkspecs/win32-clang-g++/qmake.conf
index 59d42176f0..d9eaad4637 100644
--- a/mkspecs/win32-clang-g++/qmake.conf
+++ b/mkspecs/win32-clang-g++/qmake.conf
@@ -14,11 +14,11 @@ include(../common/g++-win32.conf)
 QMAKE_COMPILER         += clang llvm   # clang pretends to be gcc
 
 QMAKE_CC                = $${CROSS_COMPILE}clang
-QMAKE_CFLAGS           +=
+QMAKE_CFLAGS           += -fstack-protector-all -D_FORTIFY_SOURCE=2
 QMAKE_CFLAGS_WARN_ON   += -Wextra -Wno-ignored-attributes
 
 QMAKE_CXX               = $${CROSS_COMPILE}clang++
-QMAKE_CXXFLAGS         +=
+QMAKE_CXXFLAGS         += -fstack-protector-all -D_FORTIFY_SOURCE=2
 QMAKE_CXXFLAGS_WARN_ON  = $$QMAKE_CFLAGS_WARN_ON
 
 QMAKE_LINK              = $${CROSS_COMPILE}clang++
@@ -32,4 +32,6 @@ QMAKE_LFLAGS_LTCG       = $$QMAKE_CFLAGS_LTCG
 
 QMAKE_CFLAGS_OPTIMIZE_SIZE = -Oz
 
+QMAKE_LFLAGS += -fstack-protector-strong -lssp
+
 load(qt_config)