diff --git a/src/or/directory.c b/src/or/directory.c
index 5cabfa334f..259794e088 100644
--- a/src/or/directory.c
+++ b/src/or/directory.c
@@ -1591,5 +1591,6 @@ dir_split_resource_into_fingerprints(const char *resource,
         *compressed_out = 1;
     }
   }
+  return 0;
 }