diff --git a/snowplow-tracker/src/main/java/com/snowplowanalytics/core/tracker/Subject.kt b/snowplow-tracker/src/main/java/com/snowplowanalytics/core/tracker/Subject.kt
index 9c6025ffa..8af9aca43 100755
--- a/snowplow-tracker/src/main/java/com/snowplowanalytics/core/tracker/Subject.kt
+++ b/snowplow-tracker/src/main/java/com/snowplowanalytics/core/tracker/Subject.kt
@@ -229,8 +229,8 @@ class Subject(context: Context, config: SubjectConfigurationInterface?) {
      * @param context the Android context
      * @param useContextResourcesScreenResolution whether to get the size from the context resources or not
      */
-    private fun setDefaultScreenResolution(context: Context, useContextResourcesScreenResolution: Boolean) {
-        if (useContextResourcesScreenResolution) {
+    private fun setDefaultScreenResolution(context: Context, useContextResourcesScreenResolution: Boolean?) {
+        if (useContextResourcesScreenResolution == true) {
             val width = context.resources.displayMetrics.widthPixels
             val height = context.resources.displayMetrics.heightPixels
             screenResolution = Size(width, height)