diff --git a/Lib/pdb.py b/Lib/pdb.py
index 2bc836f..88303d0 100755
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -28,7 +28,7 @@
     return sys.stdin.readline()
 
 def find_function(funcname, filename):
-    cre = re.compile(r'def\s+%s\s*[(]' % funcname)
+    cre = re.compile(r'def\s+%s\s*[(]' % re.escape(funcname))
     try:
         fp = open(filename)
     except IOError: