diff --git a/wa/framework/output.py b/wa/framework/output.py
index 48d98974..41e7c8e7 100644
--- a/wa/framework/output.py
+++ b/wa/framework/output.py
@@ -948,8 +948,9 @@ class DatabaseOutput(Output):
 
 def kernel_config_from_db(raw):
     kernel_config = {}
-    for k, v in zip(raw[0], raw[1]):
-        kernel_config[k] = v
+    if raw:
+        for k, v in zip(raw[0], raw[1]):
+            kernel_config[k] = v
     return kernel_config