diff --git a/extensions/ui/org.eclipse.smarthome.ui.paper/tests/configService.test.js b/extensions/ui/org.eclipse.smarthome.ui.paper/tests/configService.test.js
index 57d495bc366..148ec8657b5 100644
--- a/extensions/ui/org.eclipse.smarthome.ui.paper/tests/configService.test.js
+++ b/extensions/ui/org.eclipse.smarthome.ui.paper/tests/configService.test.js
@@ -235,7 +235,7 @@ describe('factory configService', function() {
             var params = configService.getRenderingModel(inputParams);
             expect(params[0].parameters[0].element).toEqual("input");
             expect(params[0].parameters[0].inputType).toEqual("number");
-            expect(params[0].parameters[0].pattern).toEqual("\\d+");
+            expect(params[0].parameters[0].pattern).toEqual("-?\\d+");
 
             inputParams[0].pattern = '[1-3]{4}';
             var params = configService.getRenderingModel(inputParams);
diff --git a/extensions/ui/org.eclipse.smarthome.ui.paper/web-src/js/services.js b/extensions/ui/org.eclipse.smarthome.ui.paper/web-src/js/services.js
index deb6abf9ef8..0dc7e17383b 100644
--- a/extensions/ui/org.eclipse.smarthome.ui.paper/web-src/js/services.js
+++ b/extensions/ui/org.eclipse.smarthome.ui.paper/web-src/js/services.js
@@ -196,7 +196,7 @@ angular.module('PaperUI.services', [ 'PaperUI.services.repositories', 'PaperUI.c
             adjustNumberValue(parameter, parseInt);
             if (!parameter.pattern) {
                 // force the input of integers if not stated otherwise.
-                parameter.pattern = '\\d+'
+                parameter.pattern = '-?\\d+'
             }
         }
         if (type === 'DECIMAL') {