diff --git a/configure.ac b/configure.ac
index b7a41b55..f4192961 100644
--- a/configure.ac
+++ b/configure.ac
@@ -13,7 +13,12 @@ AM_PROG_CC_C_O
 
 changequote(,)dnl
 if test "x$GCC" = "xyes"; then
-  WARN_CFLAGS="-Wall -Werror=missing-prototypes"
+  WARN_CFLAGS="-Wall -Wstrict-prototypes -Werror=missing-prototypes \
+		-Werror=implicit-function-declaration \
+		-Werror=pointer-arith -Werror=init-self -Werror=format=2 \
+		-Werror=format-security \
+		-Werror=missing-include-dirs -Werror=aggregate-return \
+		-Werror=declaration-after-statement"
 fi
 changequote([,])dnl
 AC_SUBST(WARN_CFLAGS)