diff --git a/source/blender/compositor/operations/COM_FlipOperation.cc b/source/blender/compositor/operations/COM_FlipOperation.cc
index aa65198f09a..04bf25baa6e 100644
--- a/source/blender/compositor/operations/COM_FlipOperation.cc
+++ b/source/blender/compositor/operations/COM_FlipOperation.cc
@@ -17,7 +17,7 @@ FlipOperation::FlipOperation()
 }
 
 void FlipOperation::get_area_of_interest(const int input_idx,
-                                         const rcti &/*output_area*/,
+                                         const rcti & /*output_area*/,
                                          rcti &r_input_area)
 {
   BLI_assert(input_idx == 0);