diff --git a/ppc-simd.cpp b/ppc-simd.cpp
index 3c216001..e6135c6b 100644
--- a/ppc-simd.cpp
+++ b/ppc-simd.cpp
@@ -64,6 +64,7 @@ extern "C" {
 };
 #endif  // Not CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
 
+#if (CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64)
 bool CPU_ProbeAltivec()
 {
 #if (CRYPTOPP_ALTIVEC_AVAILABLE)
@@ -317,5 +318,5 @@ bool CPU_ProbeSHA2()
 	return false;
 #endif  // CRYPTOPP_ALTIVEC_AVAILABLE
 }
-
+# endif  // CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64
 NAMESPACE_END