diff --git a/tools/callstats.py b/tools/callstats.py
index 66ef87b7c2..28408bf3eb 100755
--- a/tools/callstats.py
+++ b/tools/callstats.py
@@ -317,10 +317,10 @@ def read_stats(path, domain, args):
         ('Group-IC', re.compile(".*IC.*")),
         ('Group-Optimize',
          re.compile("StackGuard|.*Optimize.*|.*Deoptimize.*|Recompile.*")),
-        ('Group-Compile', re.compile("Compile.*")),
-        ('Group-Parse', re.compile("Parse.*")),
-        ('Group-Callback', re.compile("Callback$")),
-        ('Group-API', re.compile("API.*")),
+        ('Group-Compile', re.compile(".*Compile.*")),
+        ('Group-Parse', re.compile(".*Parse.*")),
+        ('Group-Callback', re.compile(".*Callback.*")),
+        ('Group-API', re.compile(".*API.*")),
         ('Group-GC', re.compile("GC|AllocateInTargetSpace")),
         ('Group-JavaScript', re.compile("JS_Execution")),
         ('Group-Runtime', re.compile(".*"))]