diff --git a/arm_compute/runtime/CL/functions/CLSlice.h b/arm_compute/runtime/CL/functions/CLSlice.h
index 23c398c..f17e772 100644
--- a/arm_compute/runtime/CL/functions/CLSlice.h
+++ b/arm_compute/runtime/CL/functions/CLSlice.h
@@ -31,6 +31,8 @@
 {
 // Forward Declarations
 class ICLTensor;
+class CLCompileContext;
+class ITensorInfo;
 
 namespace experimental
 {