diff --git a/src/quickfix.c b/src/quickfix.c
index 6a38c78..db4c0fa 100644
--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -207,9 +207,9 @@
     char_u	    *fmtstr = NULL;
     char_u	    *growbuf = NULL;
     int		    growbuflen;
-    int		    growbufsiz;
-    char_u	    *linebuf;
-    int		    linelen;
+    int		    growbufsiz = 0;
+    char_u	    *linebuf = NULL;
+    int		    linelen = 0;
     int		    discard;
     int		    col = 0;
     char_u	    use_viscol = FALSE;