Index: xserver-xorg-input-mouse/src/bsd_mouse.c
===================================================================
--- xserver-xorg-input-mouse.orig/src/bsd_mouse.c
+++ xserver-xorg-input-mouse/src/bsd_mouse.c
@@ -139,10 +139,10 @@ CheckProtocol(const char *protocol)
 {
     int i;
 
-    for (i = 0; internalNames[i]; i++)
+    for (i = -1; internalNames[++i];)
 	if (xf86NameCmp(protocol, internalNames[i]) == 0)
 	    return TRUE;
-    for (i = 0; miscNames[i]; i++)
+    for (i = -1; miscNames[++i];)
 	if (xf86NameCmp(protocol, miscNames[i]) == 0)
 	    return TRUE;
     return FALSE;