diff --git a/vm.c b/vm.c
index 4b99d00710..c63c773194 100644
--- a/vm.c
+++ b/vm.c
@@ -1087,7 +1087,7 @@ invoke_block_from_c_bh(rb_execution_context_t *ec, VALUE block_handler,
       case block_handler_type_ifunc:
 	return vm_yield_with_cfunc(ec, VM_BH_TO_IFUNC_BLOCK(block_handler),
 				   VM_BH_TO_IFUNC_BLOCK(block_handler)->self,
-				   argc, argv, passed_block_handler, NULL);
+                                   argc, argv, passed_block_handler, NULL);
       case block_handler_type_symbol:
 	return vm_yield_with_symbol(ec, VM_BH_TO_SYMBOL(block_handler),
 				    argc, argv, passed_block_handler);
@@ -1164,7 +1164,7 @@ invoke_block_from_c_proc(rb_execution_context_t *ec, const rb_proc_t *proc,
       case block_type_iseq:
         return invoke_iseq_block_from_c(ec, &block->as.captured, self, argc, argv, passed_block_handler, NULL, is_lambda, me);
       case block_type_ifunc:
-	return vm_yield_with_cfunc(ec, &block->as.captured, self, argc, argv, passed_block_handler, me);
+        return vm_yield_with_cfunc(ec, &block->as.captured, self, argc, argv, passed_block_handler, me);
       case block_type_symbol:
 	return vm_yield_with_symbol(ec, block->as.symbol, argc, argv, passed_block_handler);
       case block_type_proc:
diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index caf8514aad..84ed11662e 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -2511,7 +2511,7 @@ block_proc_is_lambda(const VALUE procval)
 static VALUE
 vm_yield_with_cfunc(rb_execution_context_t *ec,
 		    const struct rb_captured_block *captured,
-		    VALUE self, int argc, const VALUE *argv, VALUE block_handler,
+                    VALUE self, int argc, const VALUE *argv, VALUE block_handler,
                     const rb_callable_method_entry_t *me)
 {
     int is_lambda = FALSE; /* TODO */
@@ -2531,7 +2531,7 @@ vm_yield_with_cfunc(rb_execution_context_t *ec,
     blockarg = rb_vm_bh_to_procval(ec, block_handler);
 
     vm_push_frame(ec, (const rb_iseq_t *)captured->code.ifunc,
-		  VM_FRAME_MAGIC_IFUNC | VM_FRAME_FLAG_CFRAME |
+                  VM_FRAME_MAGIC_IFUNC | VM_FRAME_FLAG_CFRAME |
                   (me ? VM_FRAME_FLAG_BMETHOD : 0),
 		  self,
 		  VM_GUARDED_PREV_EP(captured->ep),