diff --git a/src/libCom/macLib/macLib.h b/src/libCom/macLib/macLib.h
index 1f3794425..5e5f2e6c9 100644
--- a/src/libCom/macLib/macLib.h
+++ b/src/libCom/macLib/macLib.h
@@ -131,7 +131,7 @@ epicsShareFunc void
 epicsShareAPI macSuppressWarning(
     MAC_HANDLE  *handle,        /* opaque handle */
 
-    int         falseTrue       /*0 means ussue, 1 means suppress*/
+    int         falseTrue       /*0 means issue, 1 means suppress*/
 );
 
 epicsShareFunc long             /* #chars copied, <0 if any macros are */