diff --git a/smoketest/libtest.cxx b/smoketest/libtest.cxx
index c7e897083482..a7f72e4d158d 100644
--- a/smoketest/libtest.cxx
+++ b/smoketest/libtest.cxx
@@ -24,7 +24,7 @@
         return GetTickCount();
     }
 
-    bool IsAbsolutePath(char *pPath)
+    bool IsAbsolutePath(char const *pPath)
     {
         if (pPath[1] != ':')
         {