diff --git a/src/util/virpci.c b/src/util/virpci.c
index 3f1252d42bbc59133d2890b3c73e1f0ecabc120f..be35017dad9f6c8d077e2db8061ef96bfe30d49e 100644
--- a/src/util/virpci.c
+++ b/src/util/virpci.c
@@ -2573,6 +2573,7 @@ virPCIGetVirtualFunctions(const char *sysfs_path,
     for (i = 0; i < *num_virtual_functions; i++)
         VIR_FREE((*virtual_functions)[i]);
     VIR_FREE(*virtual_functions);
+    *num_virtual_functions = 0;
     goto cleanup;
 }