1 files changed, 4 insertions, 0 deletions
diff --git a/regint.h b/regint.h
index 63d9a12a2d..e6c499ac7e 100644
--- a/regint.h
+++ b/regint.h
@@ -85,6 +85,10 @@
 /* escape other system UChar definition */
 #ifndef RUBY_DEFINES_H
 #include "ruby/ruby.h"
+#undef xmalloc
+#undef xrealloc
+#undef xcalloc
+#undef xfree
 #endif
 #ifdef ONIG_ESCAPE_UCHAR_COLLISION
 #undef ONIG_ESCAPE_UCHAR_COLLISION