1 files changed, 1 insertions, 1 deletions
diff --git a/vm_core.h b/vm_core.h
index a4ac934609..2582d52a4c 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -1333,7 +1333,7 @@ vm_block_handler_type(VALUE block_handler)
 }
 
 static inline void
-vm_block_handler_verify(VALUE block_handler)
+vm_block_handler_verify(MAYBE_UNUSED(VALUE block_handler))
 {
     VM_ASSERT(block_handler == VM_BLOCK_HANDLER_NONE ||
 	      (vm_block_handler_type(block_handler), 1));