diff --git a/lib/Analysis/CheckSecuritySyntaxOnly.cpp b/lib/Analysis/CheckSecuritySyntaxOnly.cpp
index 17fc6d7..96c42f8 100644
--- a/lib/Analysis/CheckSecuritySyntaxOnly.cpp
+++ b/lib/Analysis/CheckSecuritySyntaxOnly.cpp
@@ -229,7 +229,7 @@
 // Entry point for check.
 //===----------------------------------------------------------------------===//
 
-void clang::CheckSecuritySyntaxOnly(Decl *D, BugReporter &BR) {  
+void clang::CheckSecuritySyntaxOnly(const Decl *D, BugReporter &BR) {  
   WalkAST walker(BR);
   walker.Visit(D->getBody());  
 }