--- chmlib-0.40/src/chm_lib.c~	2018-04-11 16:24:00.510826960 +0300
+++ chmlib-0.40/src/chm_lib.c	2018-04-11 16:27:08.169950468 +0300
@@ -153,7 +153,7 @@ typedef unsigned __int64        UInt64;
 /* Sparc        */
 /* MIPS         */
 /* PPC          */
-#elif __i386__ || __sun || __sgi || __ppc__ || __powerpc__
+#elif __arm__ || __i386__ || __sun || __sgi || __ppc__ || __powerpc__
 typedef unsigned char           UChar;
 typedef short                   Int16;
 typedef unsigned short          UInt16;
@@ -164,7 +164,7 @@ typedef unsigned long long      UInt64;
 
 /* x86-64 */
 /* Note that these may be appropriate for other 64-bit machines. */
-#elif __x86_64__ || __ia64__
+#elif __aarch64__ || __x86_64__ || __ia64__
 typedef unsigned char           UChar;
 typedef short                   Int16;
 typedef unsigned short          UInt16;