diff --git a/mc.spec b/mc.spec
index 7fe3454..1a3e453 100644
--- a/mc.spec
+++ b/mc.spec
@@ -120,6 +120,9 @@ echo "`grep %{name}-%{version}.tar.xz %{SOURCE6} | head -n1 | cut -c1-64`  %{SOU
 
 %build
 autoreconf --force --install
+%define warn_flags -W -Wall -Wstrict-prototypes -Wpointer-arith -Wformat-security -Wno-unused-parameter
+export CFLAGS="$RPM_OPT_FLAGS %{warn_flags}"
+
 export X11_WWW="%{_datadir}/mc/x11_browser"
 
 %configure \