diff --git a/opal/mca/common/verbs/common_verbs_fake.c b/opal/mca/common/verbs/common_verbs_fake.c
index 1b9f65102d..7a7531bc74 100644
--- a/opal/mca/common/verbs/common_verbs_fake.c
+++ b/opal/mca/common/verbs/common_verbs_fake.c
@@ -82,7 +82,9 @@ static struct ibv_device *fake_driver_init(const char *uverbs_sys_path,
                             value, sizeof(value)) < 0) {
         return NULL;
     }
-    sscanf(value, "%i", &vendor);
+    if (sscanf(value, "%i", &vendor) != 1) {
+        return NULL;
+    }
 
     if (vendor == PCI_VENDOR_ID_CISCO) {
         return &fake_dev;