diff --git a/extern/cuew/include/cuew.h b/extern/cuew/include/cuew.h
index 640a687e81f..c55e02ed481 100644
--- a/extern/cuew/include/cuew.h
+++ b/extern/cuew/include/cuew.h
@@ -127,7 +127,7 @@ typedef uint32_t cuuint32_t;
 typedef uint64_t cuuint64_t;
 #endif
 
-#if defined(__x86_64) || defined(AMD64) || defined(_M_AMD64) || defined (__aarch64__) || defined(_M_ARM64) || defined(__ppc64__) || defined(__PPC64__)
+#if defined(__LP64__) || defined(AMD64) || defined(_M_AMD64) || defined(_M_ARM64)
 typedef unsigned long long CUdeviceptr;
 #else
 typedef unsigned int CUdeviceptr;
diff --git a/extern/hipew/include/hipew.h b/extern/hipew/include/hipew.h
index 963c5092f0b..1706f18a9dc 100644
--- a/extern/hipew/include/hipew.h
+++ b/extern/hipew/include/hipew.h
@@ -87,7 +87,7 @@ typedef uint32_t hipuint32_t;
 typedef uint64_t hipuint64_t;
 #endif
 
-#if defined(__x86_64) || defined(AMD64) || defined(_M_AMD64) || defined (__aarch64__) || defined(_M_ARM64) || defined(__ppc64__) || defined(__PPC64__) || defined(__LP64__)
+#if defined(__LP64__) || defined(AMD64) || defined(_M_AMD64) || defined(_M_ARM64)
 typedef unsigned long long hipDeviceptr_t;
 #else
 typedef unsigned int hipDeviceptr_t;