diff --git a/dlls/wldap32/misc.c b/dlls/wldap32/misc.c
index bd8a4df..4e7e292 100644
--- a/dlls/wldap32/misc.c
+++ b/dlls/wldap32/misc.c
@@ -227,8 +227,7 @@ static void escape_filter_element( PCHAR src, ULONG srclen, PCHAR dst )
             *d++ = src[i];
         else
         {
-            sprintf( d, fmt, (unsigned char)src[i] );
-            d += 3;
+            d += sprintf( d, fmt, (unsigned char)src[i] );
         }
     }
     *++d = 0;