diff --git a/compiler-rt/lib/builtins/int_lib.h b/compiler-rt/lib/builtins/int_lib.h
--- a/compiler-rt/lib/builtins/int_lib.h
+++ b/compiler-rt/lib/builtins/int_lib.h
@@ -48,7 +48,8 @@
 #define XSTR(a) STR(a)
 #define SYMBOL_NAME(name) XSTR(__USER_LABEL_PREFIX__) #name
 
-#if defined(__ELF__) || defined(__MINGW32__) || defined(__wasm__)
+#if defined(__ELF__) || defined(__MINGW32__) || defined(__wasm__) ||           \
+    defined(_AIX)
 #define COMPILER_RT_ALIAS(name, aliasname) \
   COMPILER_RT_ABI __typeof(name) aliasname __attribute__((__alias__(#name)));
 #elif defined(__APPLE__)