diff --git a/include/sys/types.h b/include/sys/types.h
index 72b4c5c12edf2b5980b6333903958b4c2bf88a7e..18433f86dedeadc92f952a63dee241ec0a629711 100644
--- a/include/sys/types.h
+++ b/include/sys/types.h
@@ -59,7 +59,7 @@ typedef __uint32_t u_int32_t;
 typedef __uint64_t u_int64_t;
 
 #ifdef _GNU_SOURCE
-typedef unsigned long caddr_t;
+typedef char *caddr_t;
 typedef unsigned char u_char;
 typedef unsigned short u_short, ushort;
 typedef unsigned u_int, uint;