diff --git a/CMakeLists.txt b/CMakeLists.txt
index 25e66a6c99..862a363f98 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -92,15 +92,22 @@ endif()
 # Ensure the flag for PIC is added for NVCC
 if (CUDA AND CUDA_FOUND)
   if (SHARED)
-    if(${COMPILER} STREQUAL GNU OR ${COMPILER} STREQUAL CLANG)
+    # For aarch64, -fPIC (uppercase) is required.
+    if (CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
       set(CPPTRAJ_NVCC_PIC_FLAG "--compiler-options -fPIC")
+      message(STATUS "System is aarch64, forcing -fPIC for CUDA.")
     else()
-      set(CPPTRAJ_NVCC_PIC_FLAG "--compiler-options -fpic")
+      if(${COMPILER} STREQUAL GNU OR ${COMPILER} STREQUAL CLANG)
+        set(CPPTRAJ_NVCC_PIC_FLAG "--compiler-options -fpic")
+      else()
+        set(CPPTRAJ_NVCC_PIC_FLAG "--compiler-options -fPIC")
+      endif()
     endif()
-    message(STATUS "Set CUDA PIC flag ${CPPTRAJ_NVCC_PIC_FLAG}")
+
+    message(STATUS "Set CUDA PIC flag: ${CPPTRAJ_NVCC_PIC_FLAG}")
     list(APPEND CUDA_NVCC_FLAGS ${CPPTRAJ_NVCC_PIC_FLAG})
   else()
-    message(STATUS "Not setting CUDA PIC flag")
+    message(STATUS "Not a SHARED build, not setting CUDA PIC flag.")
   endif()
 endif()