diff --git a/tools/gen_sourceid.py b/tools/gen_sourceid.py
index fc7f781dfcb5b43164b4c6244c3c38c8a11b2fe6..719c3a3a98a5583578350f49a1335c73236a7c0c 100644
--- a/tools/gen_sourceid.py
+++ b/tools/gen_sourceid.py
@@ -11,7 +11,7 @@ with open("sourceid_{}_pkg.vhd".format(project), "w") as f:
       ["git", "log", "-1", "--format=%H"]).decode().strip()
     sourceid = sourceid[0:32]
   except:
-    commitid = 16 * "00"
+    sourceid = 16 * "00"
 
   # Extract current tag + dirty indicator.
   # It is not sure if the definition of dirty is stable across all git versions.