diff --git a/acinclude.m4 b/acinclude.m4
index 790248b08..092cd4e40 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -1852,7 +1852,7 @@ AC_DEFUN([CURL_CHECK_STRUCT_TIMEVAL], [
   AC_REQUIRE([AC_HEADER_TIME])dnl
   AC_REQUIRE([CURL_CHECK_HEADER_WINSOCK])dnl
   AC_REQUIRE([CURL_CHECK_HEADER_WINSOCK2])dnl
-  AC_CHECK_HEADERS(sys/types.h sys/time.h time.h)
+  AC_CHECK_HEADERS(sys/types.h sys/time.h time.h sys/socket.h)
   AC_CACHE_CHECK([for struct timeval], [ac_cv_struct_timeval], [
     AC_COMPILE_IFELSE([
       AC_LANG_PROGRAM([[
@@ -1882,6 +1882,9 @@ AC_DEFUN([CURL_CHECK_STRUCT_TIMEVAL], [
 #ifdef HAVE_TIME_H
 #include <time.h>
 #endif
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
 #endif
       ]],[[
         struct timeval ts;
diff --git a/ares/acinclude.m4 b/ares/acinclude.m4
index e9690a713..6594b6fb6 100644
--- a/ares/acinclude.m4
+++ b/ares/acinclude.m4
@@ -1320,7 +1320,7 @@ AC_DEFUN([CURL_CHECK_STRUCT_TIMEVAL], [
   AC_REQUIRE([AC_HEADER_TIME])dnl
   AC_REQUIRE([CURL_CHECK_HEADER_WINSOCK])dnl
   AC_REQUIRE([CURL_CHECK_HEADER_WINSOCK2])dnl
-  AC_CHECK_HEADERS(sys/types.h sys/time.h time.h)
+  AC_CHECK_HEADERS(sys/types.h sys/time.h time.h sys/socket.h)
   AC_CACHE_CHECK([for struct timeval], [ac_cv_struct_timeval], [
     AC_COMPILE_IFELSE([
       AC_LANG_PROGRAM([[
@@ -1350,6 +1350,9 @@ AC_DEFUN([CURL_CHECK_STRUCT_TIMEVAL], [
 #ifdef HAVE_TIME_H
 #include <time.h>
 #endif
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
 #endif
       ]],[[
         struct timeval ts;