diff --git a/Common/DCAFitter/GPU/cuda/DCAFitterN.cu b/Common/DCAFitter/GPU/cuda/DCAFitterN.cu
index ed7e8acba5397..10ac99e1cc01f 100644
--- a/Common/DCAFitter/GPU/cuda/DCAFitterN.cu
+++ b/Common/DCAFitter/GPU/cuda/DCAFitterN.cu
@@ -16,6 +16,7 @@
 #endif
 
 #include <numeric>
+#include <iostream>
 
 #include "GPUCommonDef.h"
 #include "DCAFitter/DCAFitterN.h"