diff --git a/src/ops.c b/src/ops.c
index 99388a6..5abe151 100644
--- a/src/ops.c
+++ b/src/ops.c
@@ -204,7 +204,7 @@
 	msg_attr_keep((char *)IObuff, 0, TRUE);
     }
 
-    if (!cmdmod.lockmarks)
+    if ((cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
     {
 	// Set "'[" and "']" marks.
 	curbuf->b_op_start = oap->start;
@@ -943,7 +943,7 @@
     msgmore(curbuf->b_ml.ml_line_count - old_lcount);
 
 setmarks:
-    if (!cmdmod.lockmarks)
+    if ((cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
     {
 	if (oap->block_mode)
 	{
@@ -1216,7 +1216,7 @@
     check_cursor();
     changed_lines(oap->start.lnum, oap->start.col, oap->end.lnum + 1, 0L);
 
-    if (!cmdmod.lockmarks)
+    if ((cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
     {
 	// Set "'[" and "']" marks.
 	curbuf->b_op_start = oap->start;
@@ -1329,7 +1329,7 @@
 	// No change: need to remove the Visual selection
 	redraw_curbuf_later(INVERTED);
 
-    if (!cmdmod.lockmarks)
+    if ((cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
     {
 	// Set '[ and '] marks.
 	curbuf->b_op_start = oap->start;
@@ -1942,7 +1942,7 @@
 #ifdef FEAT_PROP_POPUP
 	propcount += count_props((linenr_T) (curwin->w_cursor.lnum + t), t > 0);
 #endif
-	if (t == 0 && setmark && !cmdmod.lockmarks)
+	if (t == 0 && setmark && (cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
 	{
 	    // Set the '[ mark.
 	    curwin->w_buffer->b_op_start.lnum = curwin->w_cursor.lnum;
@@ -2088,7 +2088,7 @@
 
     ml_replace_len(curwin->w_cursor.lnum, newp, (colnr_T)newp_len, TRUE, FALSE);
 
-    if (setmark && !cmdmod.lockmarks)
+    if (setmark && (cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
     {
 	// Set the '] mark.
 	curwin->w_buffer->b_op_end.lnum = curwin->w_cursor.lnum;
@@ -2405,7 +2405,7 @@
 
 	// Set '[ mark if something changed. Keep the last end
 	// position from do_addsub().
-	if (change_cnt > 0 && !cmdmod.lockmarks)
+	if (change_cnt > 0 && (cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
 	    curbuf->b_op_start = startpos;
 
 	if (change_cnt > p_report)
@@ -2852,7 +2852,7 @@
 	    --curwin->w_cursor.col;
     }
 
-    if (did_change && !cmdmod.lockmarks)
+    if (did_change && (cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
     {
 	// set the '[ and '] marks
 	curbuf->b_op_start = startpos;
@@ -3301,7 +3301,7 @@
 	(void)call_func_retnr(p_opfunc, 1, argv);
 
 	virtual_op = save_virtual_op;
-	if (cmdmod.lockmarks)
+	if (cmdmod.cmod_flags & CMOD_LOCKMARKS)
 	{
 	    curbuf->b_op_start = orig_start;
 	    curbuf->b_op_end = orig_end;