diff --git a/extern/cuew/include/cuew.h b/extern/cuew/include/cuew.h
index 1908711..7a72ceb 100644
--- a/extern/cuew/include/cuew.h
+++ b/extern/cuew/include/cuew.h
@@ -114,9 +114,9 @@ extern "C" {
 #define cuGLGetDevices cuGLGetDevices_v2
 
 /* Types. */
-#if defined(__x86_64) || defined(AMD64) || defined(_M_AMD64)
-typedef unsigned long long CUdeviceptr;
-#else
+#if defined(__x86_64) || defined(AMD64) || defined(_M_AMD64) || defined (__aarch64__)
+typedef unsigned long long CUdeviceptr; 
+#else 
 typedef unsigned int CUdeviceptr;
 #endif