diff --git a/stim/cuda/cudatools/error.h b/stim/cuda/cudatools/error.h
index ddce736..517113b 100644
--- a/stim/cuda/cudatools/error.h
+++ b/stim/cuda/cudatools/error.h
@@ -3,7 +3,6 @@
 
 #include <stdio.h>
 #include <iostream>
-using namespace std;
 #include "cuda_runtime.h"
 #include "device_launch_parameters.h"
 #include "cufft.h"
@@ -23,19 +22,19 @@ static void cufftHandleError( cufftResult err, const char*file, int line )
     if (err != CUFFT_SUCCESS)
     {
         if(err == CUFFT_INVALID_PLAN)
-            cout<<"The plan parameter is not a valid handle."<<endl;
+            std::cout<<"The plan parameter is not a valid handle."<<std::endl;
         else if(err == CUFFT_ALLOC_FAILED)
-            cout<<"Allocation failed."<<endl;
+            std::cout<<"Allocation failed."<<std::endl;
         else if(err == CUFFT_INVALID_VALUE)
-            cout<<"At least one of the parameters idata, odata, and direction is not valid."<<endl;
+            std::cout<<"At least one of the parameters idata, odata, and direction is not valid."<<std::endl;
         else if(err == CUFFT_INTERNAL_ERROR)
-            cout<<"An internal driver error was detected."<<endl;
+            std::cout<<"An internal driver error was detected."<<std::endl;
         else if(err == CUFFT_EXEC_FAILED)
-            cout<<"CUFFT failed to execute the transform on the GPU."<<endl;
+            std::cout<<"CUFFT failed to execute the transform on the GPU."<<std::endl;
         else if(err == CUFFT_SETUP_FAILED)
-            cout<<"The CUFFT library failed to initialize."<<endl;
+            std::cout<<"The CUFFT library failed to initialize."<<std::endl;
         else
-            cout<<"Unknown error: "<<err<<endl;
+            std::cout<<"Unknown error: "<<err<<std::endl;
 
     }
 }
--
libgit2 0.21.4