1 files changed, 1 insertions, 1 deletions
diff --git a/vm_core.h b/vm_core.h
index 8d3ca8ab20..4e62bb5d8f 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -345,7 +345,7 @@ typedef struct {
     VALUE prof_time_chld;       /* cfp[13] */
 } rb_control_frame_t;
 
-typedef struct {
+typedef struct rb_block_struct {
     VALUE self;			/* share with method frame if it's only block */
     VALUE *lfp;			/* share with method frame if it's only block */
     VALUE *dfp;			/* share with method frame if it's only block */