diff --git a/include/amber/amber.h b/include/amber/amber.h
index 57e29640..fc8ce4bf 100644
--- a/include/amber/amber.h
+++ b/include/amber/amber.h
@@ -103,7 +103,7 @@ class Delegate {
                                        amber::BufferInfo* buffer) const = 0;
 
   /// Mechanism for gathering timing from 'TIME_EXECUTION'
-  virtual void ReportExecutionTiming(double time_in_ms) = 0;
+  virtual void ReportExecutionTiming(double){}
 };
 
 /// Stores configuration options for Amber.
diff --git a/src/vulkan/pipeline.h b/src/vulkan/pipeline.h
index 68fce4e7..db93c000 100644
--- a/src/vulkan/pipeline.h
+++ b/src/vulkan/pipeline.h
@@ -29,7 +29,6 @@
 #include "src/vulkan/command_buffer.h"
 #include "src/vulkan/push_constant.h"
 #include "src/vulkan/resource.h"
-#include "vulkan/vulkan_core.h"
 
 namespace amber {