diff --git a/src/os_mswin.c b/src/os_mswin.c
index 77affc0..ce4420b 100644
--- a/src/os_mswin.c
+++ b/src/os_mswin.c
@@ -473,13 +473,12 @@
 slash_adjust(p)
     char_u  *p;
 {
-    if (p != NULL)
-	while (*p)
-	{
-	    if (*p == psepcN)
-		*p = psepc;
-	    mb_ptr_adv(p);
-	}
+    while (*p)
+    {
+	if (*p == psepcN)
+	    *p = psepc;
+	mb_ptr_adv(p);
+    }
 }