diff --git a/src/components/treetable/TreeTable.vue b/src/components/treetable/TreeTable.vue
index 580b1f2e2..ef401b3cc 100755
--- a/src/components/treetable/TreeTable.vue
+++ b/src/components/treetable/TreeTable.vue
@@ -965,7 +965,7 @@ export default {
     overflow: hidden;
 }
 
-.p-treetable-resizable .p-resizable-column {
+.p-treetable-resizable .p-resizable-column:not(.p-frozen-column) {
     background-clip: padding-box;
     position: relative;
 }
@@ -1051,6 +1051,10 @@ export default {
     background: inherit;
 }
 
+.p-treetable-scrollable th.p-frozen-column {
+    z-index: 1;
+}
+
 .p-treetable-scrollable-both .p-treetable-thead > tr > th,
 .p-treetable-scrollable-both .p-treetable-tbody > tr > td,
 .p-treetable-scrollable-both .p-treetable-tfoot > tr > td,