diff --git a/include/ares_build.h.in b/include/ares_build.h.in
index 710877af..1327ed6d 100644
--- a/include/ares_build.h.in
+++ b/include/ares_build.h.in
@@ -44,7 +44,4 @@
 #  include <windows.h>
 #endif
 
-typedef CARES_TYPEOF_ARES_SOCKLEN_T ares_socklen_t;
-typedef CARES_TYPEOF_ARES_SSIZE_T ares_ssize_t;
-
 #endif /* __CARES_BUILD_H */