diff --git a/llvm/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp b/llvm/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
index 8b282a0..d2a6741 100644
--- a/llvm/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
+++ b/llvm/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
@@ -461,7 +461,7 @@
 
 // int clock(void) - Profiling implementation
 GenericValue lle_i_clock(FunctionType *M, const vector<GenericValue> &Args) {
-  extern int clock(void);
+  extern unsigned int clock(void);
   GenericValue GV; GV.IntVal = clock();
   return GV;
 }