diff --git a/src/app/components/autocomplete/autocomplete.ts b/src/app/components/autocomplete/autocomplete.ts
index 0c433291b4e..21d345a1e2f 100755
--- a/src/app/components/autocomplete/autocomplete.ts
+++ b/src/app/components/autocomplete/autocomplete.ts
@@ -440,7 +440,7 @@ export class AutoComplete implements AfterViewChecked,AfterContentInit,OnDestroy
             }
         }
         else {
-            this.inputEL.nativeElement.value = this.field ? ObjectUtils.resolveFieldData(option, this.field)||'': option;
+            this.inputEL.nativeElement.value = this.field ? this.getFieldData(option) : option;
             this.value = option;
             this.onModelChange(this.value);
         }
@@ -504,6 +504,11 @@ export class AutoComplete implements AfterViewChecked,AfterContentInit,OnDestroy
         return this.field ? ObjectUtils.resolveFieldData(value, this.field): value;
     }
 
+    getFieldData(option) {
+        let data = ObjectUtils.resolveFieldData(option, this.field);
+        return data !== null ? data : '';
+    }
+
     restoreOverlayAppend() {
         if (this.overlay && this.appendTo) {
             this.el.nativeElement.appendChild(this.overlay);