diff --git a/package/prboom/prboom.mk b/package/prboom/prboom.mk
index c1ba05ff70..fc440e5cf8 100644
--- a/package/prboom/prboom.mk
+++ b/package/prboom/prboom.mk
@@ -40,7 +40,7 @@ PRBOOM_CONF_OPTS = \
 
 # endianness detection isn't used when cross compiling
 define PRBOOM_BIG_ENDIAN_FIXUP
-	$(SED) 's,.*#undef WORDS_BIGENDIAN.*,#define WORDS_BIGENDIAN 1,g' \
+	$(SED) 's,.*#.*undef WORDS_BIGENDIAN.*,#define WORDS_BIGENDIAN 1,g' \
 		$(PRBOOM_DIR)/config.h
 endef