diff --git a/configure.in b/configure.in
index 2bae77b3f..ccbc9b195 100644
--- a/configure.in
+++ b/configure.in
@@ -224,8 +224,8 @@ case "${host}" in
 	CFLAGS="-mieee $CFLAGS"
 	;;
     *-*-mingw*)
-	CXXFLAGS="-Wno-deprecated-declarations -Wno-sign-compare -D__USE_MINGW_ANSI_STDIO=1 $CXXFLAGS"
-	CFLAGS="-Wno-sign-compare -D__USE_MINGW_ANSI_STDIO=1 $CFLAGS"
+	CXXFLAGS="-D__USE_MINGW_ANSI_STDIO=1 $CXXFLAGS"
+	CFLAGS="-D__USE_MINGW_ANSI_STDIO=1 $CFLAGS"
 	;;
 esac