--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -411,7 +411,7 @@ endif()
 
 # Check for ARM Neon support
 option(ALSOFT_REQUIRE_NEON "Require ARM NEON support" OFF)
-if(HAVE_ARM_NEON_H)
+if(HAVE_ARM_NEON_H AND CMAKE_SIZEOF_VOID_P EQUAL 4)	# only 32-bit ARM
     option(ALSOFT_CPUEXT_NEON "Enable ARM NEON support" ON)
     if(ALSOFT_CPUEXT_NEON)
         check_c_source_compiles("#include <arm_neon.h>