diff --git a/toolchain/toolchain-wrapper.c b/toolchain/toolchain-wrapper.c
index 8cfc963ccd..39e9f0850f 100644
--- a/toolchain/toolchain-wrapper.c
+++ b/toolchain/toolchain-wrapper.c
@@ -129,6 +129,8 @@ static const struct str_len_s unsafe_paths[] = {
 	STR_LEN(/usr/lib),
 	STR_LEN(/usr/local/include),
 	STR_LEN(/usr/local/lib),
+	STR_LEN(/usr/X11R6/include),
+	STR_LEN(/usr/X11R6/lib),
 	{ NULL, 0 },
 };