diff --git a/qemu/scripts/decodetree.py b/qemu/scripts/decodetree.py
index c851e95f..7913944a 100644
--- a/qemu/scripts/decodetree.py
+++ b/qemu/scripts/decodetree.py
@@ -206,7 +206,7 @@ def output(*args):
         output_fd.write(a)
 
 
-if sys.version_info >= (3, 0):
+if sys.version_info >= (3, 4):
     re_fullmatch = re.fullmatch
 else:
     def re_fullmatch(pat, str):