diff --git a/libvendorsupport/include_llndk/android/llndk-versioning.h b/libvendorsupport/include_llndk/android/llndk-versioning.h
index b375a2f..b500149 100644
--- a/libvendorsupport/include_llndk/android/llndk-versioning.h
+++ b/libvendorsupport/include_llndk/android/llndk-versioning.h
@@ -32,18 +32,25 @@
                     "call with '#if (__ANDROID_VENDOR_API__ >= " #vendor_api_level ")'."))) \
             _Pragma("clang diagnostic pop")
 
-// For the vendor libraries, __INTRODUCED_IN must be ignored because they are only for NDKs but not
-// for LLNDKs.
-#undef __INTRODUCED_IN
-#define __INTRODUCED_IN(x)
+// Use this macro as an `if` statement to call an API that are available to both NDK and LLNDK.
+// This returns true for the vendor modules if the vendor_api_level is less than or equal to the
+// ro.board.api_level.
+#define API_LEVEL_AT_LEAST(sdk_api_level, vendor_api_level) \
+    constexpr(__ANDROID_VENDOR_API__ >= vendor_api_level)
 
 #else  // __ANDROID_VENDOR__
 
-// For non-vendor libraries, __INTRODUCED_IN_LLNDK must be ignored because it must not change
-// symbols of NDK or the system side of the treble boundary. It leaves a no-op annotation for ABI
-// analysis.
+// __INTRODUCED_IN_LLNDK is for LLNDK only but not for NDK. Ignore this for non-vendor modules.
+// It leaves a no-op annotation for ABI analysis.
+#if !defined(__INTRODUCED_IN_LLNDK)
 #define __INTRODUCED_IN_LLNDK(vendor_api_level) \
     __attribute__((annotate("introduced_in_llndk=" #vendor_api_level)))
+#endif
+
+// For non-vendor modules, API_LEVEL_AT_LEAST is replaced with __builtin_available(sdk_api_level) to
+// guard the API for __INTRODUCED_IN.
+#define API_LEVEL_AT_LEAST(sdk_api_level, vendor_api_level) \
+    (__builtin_available(android sdk_api_level, *))
 
 #endif  // __ANDROID_VENDOR__