diff --git a/scripts/symbolize.py b/scripts/symbolize.py
index 715eb50..99a48c7 100755
--- a/scripts/symbolize.py
+++ b/scripts/symbolize.py
@@ -16,7 +16,7 @@
 # This gets the address from lines looking like this:
 # E/TC:0  0x001044a8
 STACK_ADDR_RE = re.compile(
-    r'[UEIDFM]/T[AC]:(\?|[0-9]+) [0-9]* +(?P<addr>0x[0-9a-f]+)')
+    r'[UEIDFM]/T[AC]:(\?+|[0-9]+) [0-9]* +(?P<addr>0x[0-9a-f]+)')
 ABORT_ADDR_RE = re.compile(r'-abort at address (?P<addr>0x[0-9a-f]+)')
 REGION_RE = re.compile(r'region [0-9]+: va (?P<addr>0x[0-9a-f]+) '
                        r'pa 0x[0-9a-f]+ size (?P<size>0x[0-9a-f]+)'