diff --git a/decompress/7zip/CpuArch.h b/decompress/7zip/CpuArch.h
index fad3646a0d..0cbd8a98b9 100755
--- a/decompress/7zip/CpuArch.h
+++ b/decompress/7zip/CpuArch.h
@@ -119,7 +119,6 @@ Stop_Compiling_Bad_Endian
 #define GetBe16(p) (((UInt16)((const Byte *)(p))[0] << 8) | ((const Byte *)(p))[1])
 
 Bool CPU_Is_InOrder();
-Bool CPU_Is_Aes_Supported();
 
 EXTERN_C_END