diff --git a/src/lib/evil/regex/regex.h b/src/lib/evil/regex/regex.h
index 2288c49ae4..b521b3a024 100644
--- a/src/lib/evil/regex/regex.h
+++ b/src/lib/evil/regex/regex.h
@@ -2,6 +2,7 @@
 #define	_REGEX_H_	/* never again */
 
 #include <evil_macro.h>
+#include <sys/types.h>
 
 /* ========= begin header generated by ../src/lib/evil/regex/mkh.sh ========= */
 #ifdef __cplusplus