diff --git a/packages/core/src/styles/GenericStyle.ts b/packages/core/src/styles/GenericStyle.ts
index d8a57627e..9a8ec3b5a 100644
--- a/packages/core/src/styles/GenericStyle.ts
+++ b/packages/core/src/styles/GenericStyle.ts
@@ -174,7 +174,7 @@ export interface Style {
      * then the list of values is repeated to yield an even number of values. Thus, 5,3,2 is equivalent to 5,3,2,5,3,2.
      * This attribute is valid for Line styles only.
      */
-    strokeDasharray?: number[] | StyleValueFunction<number[]> | StyleZoomRange<number[]> | 'none';
+    strokeDasharray?: (number|string)[] | StyleValueFunction<(number|string)[]> | StyleZoomRange<(number|string)[]> | 'none';
 
     /**
      * Defines the opacity of the style.