diff --git a/kiwix-build.py b/kiwix-build.py
index 2d68769..7f6bdb2 100755
--- a/kiwix-build.py
+++ b/kiwix-build.py
@@ -614,8 +614,6 @@ class mingw32_toolchain(Toolchain):
             env[k] = v
 
         env['PKG_CONFIG_LIBDIR'] = pj(self.root_path, 'lib', 'pkgconfig')
-        env['CFLAGS'] = " -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions --param=ssp-buffer-size=4 "+env['CFLAGS']
-        env['CXXFLAGS'] = " -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions --param=ssp-buffer-size=4 "+env['CXXFLAGS']
         env['LIBS'] = " ".join(self.buildEnv.cross_config['extra_libs']) + " " +env['LIBS']