diff --git a/components/partition_table/gen_esp32part.py b/components/partition_table/gen_esp32part.py
index 170750740..ac8f3af6a 100755
--- a/components/partition_table/gen_esp32part.py
+++ b/components/partition_table/gen_esp32part.py
@@ -160,7 +160,7 @@ class PartitionTable(list):
             subtype = SUBTYPES[int(ptype)][subtype]
         except KeyError:
             try:
-                ptype = int(ptype, 0)
+                subtype = int(subtype, 0)
             except TypeError:
                 pass