diff --git a/libi2pd/Crypto.cpp b/libi2pd/Crypto.cpp
index 68712fc7..3e6279ff 100644
--- a/libi2pd/Crypto.cpp
+++ b/libi2pd/Crypto.cpp
@@ -638,7 +638,7 @@ namespace crypto
 	{
 		uint64_t buf[256];
 		uint64_t hash[12]; // 96 bytes
-#if defined(__x86_64__) || defined(__i386__)
+#if (defined(__x86_64__) || defined(__i386__)) && defined(__AVX__) // not all X86 targets supports AVX (like old Pentium, see #1600)
 		if(i2p::cpu::avx)
 		{
 			__asm__