diff --git a/GPU/GPUTracking/Definitions/GPUDefParametersDefaults.h b/GPU/GPUTracking/Definitions/GPUDefParametersDefaults.h
index 2c750b2aabc3d..ba8f2b05e1bd5 100644
--- a/GPU/GPUTracking/Definitions/GPUDefParametersDefaults.h
+++ b/GPU/GPUTracking/Definitions/GPUDefParametersDefaults.h
@@ -105,7 +105,7 @@
     #define GPUCA_LB_GPUTPCCFDecodeZSDenseLink GPUCA_WARP_SIZE, 14
     #define GPUCA_LB_GPUTPCCFGather 1024, 1
     #define GPUCA_LB_GPUTPCGMMergerTrackFit 64, 7
-    #define GPUCA_LB_GPUTPCGMMergerFollowLoopers 256, 5
+    #define GPUCA_LB_GPUTPCGMMergerFollowLoopers 256, 4
     #define GPUCA_LB_GPUTPCGMMergerSectorRefit 256, 2
     #define GPUCA_LB_GPUTPCGMMergerUnpackResetIds 256
     #define GPUCA_LB_GPUTPCGMMergerUnpackGlobal 256