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Diffstat (limited to 'src/cmd/vac')
-rw-r--r--src/cmd/vac/file.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/cmd/vac/file.c b/src/cmd/vac/file.c
index ac7d4a2a..8f2fd84f 100644
--- a/src/cmd/vac/file.c
+++ b/src/cmd/vac/file.c
@@ -1774,7 +1774,7 @@ vacfsopen(VtConn *z, char *file, int mode, ulong cachemem)
char *prefix;
if(vtparsescore(file, &prefix, score) >= 0){
- if(strcmp(prefix, "vac") != 0){
+ if(prefix == nil || strcmp(prefix, "vac") != 0){
werrstr("not a vac file");
return nil;
}