1 files changed, 6 insertions, 1 deletions
diff --git a/expr.h b/expr.h
index c25d1ca..82df7bf 100644
--- a/expr.h
+++ b/expr.h
@@ -26,12 +26,17 @@
 #include "exec.h"
 #include "printf.h"
 #include "stat.h"
-#include <regex.h>
 #include <stdbool.h>
 #include <stddef.h>
 #include <sys/types.h>
 #include <time.h>
 
+#ifdef USE_ONIGURUMA
+	#include <onigposix.h>
+#else
+	#include <regex.h>
+#endif
+
 /**
  * Possible types of numeric comparison.
  */