diff --git a/src/cuda/CUDAStream.cu b/src/cuda/CUDAStream.cu
index b467d00..778a044 100644
--- a/src/cuda/CUDAStream.cu
+++ b/src/cuda/CUDAStream.cu
@@ -51,7 +51,7 @@ CUDAStream<T>::CUDAStream(const int ARRAY_SIZE, const int device_index)
   // Check buffers fit on the device
   cudaDeviceProp props;
   cudaGetDeviceProperties(&props, 0);
-  if (props.totalGlobalMem < 3*ARRAY_SIZE*sizeof(T))
+  if (props.totalGlobalMem < std::size_t{3}*ARRAY_SIZE*sizeof(T))
     throw std::runtime_error("Device does not have enough memory for all 3 buffers");
 
   // Create device buffers