diff --git a/src/profiling/ProfilingUtils.hpp b/src/profiling/ProfilingUtils.hpp
index fae1a83..74fc437 100644
--- a/src/profiling/ProfilingUtils.hpp
+++ b/src/profiling/ProfilingUtils.hpp
@@ -202,9 +202,11 @@
     using Exception::Exception;
 };
 
-}    // namespace profiling
+uint64_t GetTimestamp();
 
-}    // namespace armnn
+} // namespace profiling
+
+} // namespace armnn
 
 namespace std
 {