diff --git a/src/vim9execute.c b/src/vim9execute.c
index 115212f..759154e 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -832,6 +832,8 @@
     int		save_suppress_errthrow = suppress_errthrow;
     msglist_T	**saved_msg_list = NULL;
     msglist_T	*private_msg_list = NULL;
+    int		save_msg_silent = -1;
+    int		save_emsg_silent = -1;
 
 // Get pointer to item in the stack.
 #define STACK_TV(idx) (((typval_T *)ectx.ec_stack.ga_data) + idx)
@@ -2814,6 +2816,24 @@
 		}
 		break;
 
+	    case ISN_SILENT:
+		if (save_msg_silent == -1)
+		    save_msg_silent = msg_silent;
+		++msg_silent;
+		if (iptr->isn_arg.number)
+		{
+		    if (save_emsg_silent == -1)
+			save_emsg_silent = emsg_silent;
+		    ++emsg_silent;
+		}
+		break;
+
+	    case ISN_UNSILENT:
+		--msg_silent;
+		if (iptr->isn_arg.number)
+		    --emsg_silent;
+		break;
+
 	    case ISN_SHUFFLE:
 		{
 		    typval_T	    tmp_tv;
@@ -2885,6 +2905,11 @@
     }
     msg_list = saved_msg_list;
 
+    if (save_msg_silent != -1)
+	msg_silent = save_msg_silent;
+    if (save_emsg_silent != -1)
+	emsg_silent = save_emsg_silent;
+
 failed_early:
     // Free all local variables, but not arguments.
     for (idx = 0; idx < ectx.ec_stack.ga_len; ++idx)
@@ -3502,6 +3527,11 @@
 					     (long)iptr->isn_arg.put.put_lnum);
 		break;
 
+	    case ISN_SILENT: smsg("%4d SILENT%s", current,
+				       iptr->isn_arg.number ? "!" : ""); break;
+	    case ISN_UNSILENT: smsg("%4d UNSILENT%s", current,
+				       iptr->isn_arg.number ? "!" : ""); break;
+
 	    case ISN_SHUFFLE: smsg("%4d SHUFFLE %d up %d", current,
 					 iptr->isn_arg.shuffle.shfl_item,
 					 iptr->isn_arg.shuffle.shfl_up);