diff --git a/ompi/mca/btl/btl.h b/ompi/mca/btl/btl.h
index 5485b770bf..d54225cd89 100644
--- a/ompi/mca/btl/btl.h
+++ b/ompi/mca/btl/btl.h
@@ -251,8 +251,7 @@ typedef void (*mca_btl_base_completion_fn_t)(
  *
  * BTL MUST use mca_btl_base_segment_t or a subclass and
  * MUST store their segment length in btl_seg_size. BTLs
- * MIST specify a segment no larger than MCA_BTL_SEG_MAX_SIZE.
- *
+ * MUST specify a segment no larger than MCA_BTL_SEG_MAX_SIZE.
  */
 
 struct mca_btl_base_segment_t {