diff --git a/gpu/D3Q19.cu b/gpu/D3Q19.cu
index 060df16b..82b35492 100644
--- a/gpu/D3Q19.cu
+++ b/gpu/D3Q19.cu
@@ -2544,8 +2544,8 @@ extern "C" double ScaLBL_D3Q19_AAodd_Flux_BC_z(int *neighborList, int *list, dou
 	// Allocate memory to store the sums
 	double din;
 	double *sum;
-	cudaHostAlloc((void **)&sum,sizeof(double));
  	double *dvcsum;
+	cudaHostAlloc((void **)&sum,sizeof(double));
 	cudaMalloc((void **)&dvcsum,sizeof(double)*count);
 	cudaMemset(dvcsum,0,sizeof(double)*count);
 	int sharedBytes = 512*sizeof(double);