diff --git a/src/rmt.h b/src/rmt.h
index 3c9b42f1..d9490711 100644
--- a/src/rmt.h
+++ b/src/rmt.h
@@ -34,7 +34,7 @@ int rmt_ioctl__ (int, int, char *);
 
 #define _remdev(Path) \
   (!force_local_option && (rmt_path__ = strchr (Path, ':')) \
-   && rmt_path__ > (Path) && ! memchr (Path, rmt_path__ - (Path), '/'))
+   && rmt_path__ > (Path) && ! memchr (Path, '/', rmt_path__ - (Path)))
 
 #define _isrmt(Fd) \
   ((Fd) >= __REM_BIAS)