diff --git a/gcm.cpp b/gcm.cpp
index 755f2e86..b5400b98 100644
--- a/gcm.cpp
+++ b/gcm.cpp
@@ -13,7 +13,7 @@
 #ifndef CRYPTOPP_GENERATE_X64_MASM
 
 // Clang 3.3 integrated assembler crash on Linux. MacPorts GCC compile error. SunCC crash under Sun Studio 12.5 and below.
-#if (defined(CRYPTOPP_LLVM_CLANG_VERSION) && (CRYPTOPP_LLVM_CLANG_VERSION < 30400)) || defined(CRYPTOPP_CLANG_INTEGRATED_ASSEMBLER) || (__SUNPRO_CC <= 0x5140)
+#if (defined(CRYPTOPP_LLVM_CLANG_VERSION) && (CRYPTOPP_LLVM_CLANG_VERSION < 30400)) || defined(CRYPTOPP_CLANG_INTEGRATED_ASSEMBLER) || (defined(__SUNPRO_CC) && __SUNPRO_CC <= 0x5140)
 # undef CRYPTOPP_X86_ASM_AVAILABLE
 # undef CRYPTOPP_X32_ASM_AVAILABLE
 # undef CRYPTOPP_X64_ASM_AVAILABLE