diff --git a/GPU/GPUTracking/Base/GPUReconstructionIncludesITS.h b/GPU/GPUTracking/Base/GPUReconstructionIncludesITS.h
index 87829f5634375..f4ef3b464c24f 100644
--- a/GPU/GPUTracking/Base/GPUReconstructionIncludesITS.h
+++ b/GPU/GPUTracking/Base/GPUReconstructionIncludesITS.h
@@ -42,13 +42,13 @@ class VertexerTraitsGPU : public VertexerTraits
 {
 };
 template <int32_t NLayers = 7>
-class TrackerTraitsGPU : public TrackerTraits
+class TrackerTraitsGPU : public TrackerTraits<NLayers>
 {
 };
 namespace gpu
 {
 template <int32_t NLayers = 7>
-class TimeFrameGPU : public TimeFrame
+class TimeFrameGPU : public TimeFrame<NLayers>
 {
 };
 } // namespace gpu