diff --git a/src/jsinterp.py b/src/jsinterp.py
index 9020c8e1..a9318c46 100644
--- a/src/jsinterp.py
+++ b/src/jsinterp.py
@@ -234,7 +234,7 @@ def extract_object(self, objname):
     def extract_function(self, funcname):
         func_m = re.search(
             r'''(?x)
-                (?:function\s+%s|[{;,]%s\s*=\s*function|var\s+%s\s*=\s*function)\s*
+                (?:function\s+%s|[{;,]\s*%s\s*=\s*function|var\s+%s\s*=\s*function)\s*
                 \((?P<args>[^)]*)\)\s*
                 \{(?P<code>[^}]+)\}''' % (
                 re.escape(funcname), re.escape(funcname), re.escape(funcname)),