diff --git a/cmake/check_types.cmake b/cmake/check_types.cmake
index 3ecedb1..3aaba29 100644
--- a/cmake/check_types.cmake
+++ b/cmake/check_types.cmake
@@ -21,7 +21,7 @@ SET(CMAKE_EXTRA_INCLUDE_FILES stdio.h)
 CHECK_TYPE_SIZE(size_t SIZEOF_SIZE_T)
 SET(CMAKE_EXTRA_INCLUDE_FILES sys/types.h)
 CHECK_TYPE_SIZE(uint SIZEOF_UINT)
-CHECK_TYPE_SIZE(uint SIZEOF_USHORT)
+CHECK_TYPE_SIZE(ushort SIZEOF_USHORT)
 CHECK_TYPE_SIZE(ulong SIZEOF_ULONG)
 CHECK_TYPE_SIZE(int8 SIZEOF_INT8)
 CHECK_TYPE_SIZE(uint8 SIZEOF_UINT8)