diff --git a/config.recommend b/config.recommend
index eb7dbb58..8f11bfc0 100644
--- a/config.recommend
+++ b/config.recommend
@@ -469,7 +469,7 @@ NAMESPACE_END
 	
 // Linux provides X32, which is 32-bit integers, longs and pointers on x86_64 using the full x86_64 register set.
 // Detect via __ILP32__ (http://wiki.debian.org/X32Port). Both GCC and Clang provide the preprocessor macro.
-#if ((__ILP32__ >= 1) || (_ILP32 >= 1))
+#if ((__ILP32__ >= 1) || (_ILP32 >= 1)) && defined(__x86_64__)
 	#define CRYPTOPP_BOOL_X32 1
 #else
 	#define CRYPTOPP_BOOL_X32 0