diff --git a/src/ex_getln.c b/src/ex_getln.c
index a00d6de..80a9204 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -142,6 +142,7 @@
 typedef struct {
     pos_T	search_start;	// where 'incsearch' starts searching
     pos_T	save_cursor;
+    int		winid;		// window where this state is valid
     viewstate_T	init_viewstate;
     viewstate_T	old_viewstate;
     pos_T	match_start;
@@ -154,6 +155,7 @@
     static void
 init_incsearch_state(incsearch_state_T *is_state)
 {
+    is_state->winid = curwin->w_id;
     is_state->match_start = curwin->w_cursor;
     is_state->did_incsearch = FALSE;
     is_state->incsearch_postponed = FALSE;
@@ -1703,13 +1705,13 @@
 	// Trigger SafeState if nothing is pending.
 	may_trigger_safestate(xpc.xp_numfiles <= 0);
 
-	cursorcmd();		// set the cursor on the right spot
-
 	// Get a character.  Ignore K_IGNORE and K_NOP, they should not do
 	// anything, such as stop completion.
 	do
+	{
+	    cursorcmd();		// set the cursor on the right spot
 	    c = safe_vgetc();
-	while (c == K_IGNORE || c == K_NOP);
+	} while (c == K_IGNORE || c == K_NOP);
 
 	if (c == K_COMMAND
 		   && do_cmdline(NULL, getcmdkeycmd, NULL, DOCMD_NOWAIT) == OK)
@@ -2327,6 +2329,11 @@
 #endif
 
 cmdline_changed:
+#ifdef FEAT_SEARCH_EXTRA
+	// If the window changed incremental search state is not valid.
+	if (is_state.winid != curwin->w_id)
+	    init_incsearch_state(&is_state);
+#endif
 	// Trigger CmdlineChanged autocommands.
 	trigger_cmd_autocmd(cmdline_type, EVENT_CMDLINECHANGED);