diff --git a/bindings/python/test_arm.py b/bindings/python/test_arm.py
index 625be013..68fd9eed 100755
--- a/bindings/python/test_arm.py
+++ b/bindings/python/test_arm.py
@@ -78,7 +78,7 @@ def print_insn_detail(insn):
             if i.vector_index != -1:
                 print("\t\t\toperands[%u].vector_index = %u" %(c, i.vector_index))
             if i.subtracted:
-                print("\t\t\toperands[%u].subtracted = True")
+                print("\t\t\toperands[%u].subtracted = True" %c)
 
             c += 1