diff --git a/ChangeLog b/ChangeLog
index e8ac4dd946..d6c6ed0830 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -316,7 +316,7 @@ Thu Nov 21 13:43:07 2013  Koichi Sasada  <ko1@atdot.net>
 	  "struct reflist".
 
 	* gc.c (init_mark_stack): do not use push_mark_stack_chunk() at init.
-	  This pre-allocation causes failure on is_mark_stask_empty()
+	  This pre-allocation causes failure on is_mark_stack_empty()
 	  without any pushing.
 
 Thu Nov 21 13:40:20 2013  Zachary Scott  <e@zzak.io>
diff --git a/gc.c b/gc.c
index c7230c52ff..998d0e6802 100644
--- a/gc.c
+++ b/gc.c
@@ -3030,7 +3030,7 @@ stack_chunk_alloc(void)
 }
 
 static inline int
-is_mark_stask_empty(mark_stack_t *stack)
+is_mark_stack_empty(mark_stack_t *stack)
 {
     return stack->chunk == NULL;
 }
@@ -3117,7 +3117,7 @@ push_mark_stack(mark_stack_t *stack, VALUE data)
 static int
 pop_mark_stack(mark_stack_t *stack, VALUE *data)
 {
-    if (is_mark_stask_empty(stack)) {
+    if (is_mark_stack_empty(stack)) {
         return FALSE;
     }
     if (stack->index == 1) {