diff --git a/undar-mode.el b/undar-mode.el
index 5bf599f..b704a73 100755
--- a/undar-mode.el
+++ b/undar-mode.el
@@ -49,7 +49,7 @@
     ("\\b[A-Z][a-zA-Z0-9_]*\\b" . font-lock-type-face)
 
     ;; Function definitions: "function name(...)"
-    ("\\_<function\\>\\s-+\\([\\w+\\)(" (1 font-lock-function-name-face))
+    ("\\_<function\\>\\s-+\\(\\w+\\)\\s-*(" (1 font-lock-function-name-face))
 
     ;; Numbers (Integers and Floats)
     ("\\b-?[0-9]+\\(?:\\.[0-9]+\\)?\\(?:[eE][+-]?[0-9]+\\)?\\b" . font-lock-constant-face)