--- a/third_party/openpgp.configure
+++ b/third_party/openpgp.configure
@@ -171,21 +171,21 @@ with only_when("--enable-compile-environ
     have_string_h = check_header("string.h")
     check_headers(
         "limits.h",
         "sys/auxv.h",
         "sys/cdefs.h",
         "sys/resource.h",
         "sys/param.h",
         "sys/stat.h",
-        "sys/time.h",
         "sys/wait.h",
     )
 
     set_define("HAVE_MKDTEMP", check_symbol_exists("mkdtemp", ["stdlib.h", "unistd.h"]))
+    set_define("HAVE_MKSTEMP", check_symbol_exists("mkstemp", ["stdlib.h", "unistd.h"]))
     set_define("HAVE_REALPATH", check_symbol_exists("realpath", "stdlib.h"))
     set_define("HAVE_O_BINARY", check_symbol_exists("O_BINARY", "fcntl.h"))
     set_define("HAVE__O_BINARY", check_symbol_exists("_O_BINARY", "fcntl.h"))
 
     # Checks when building JSON-C from tree sources
     # =============================================
     with only_when(in_tree_jsonc):
         have_stdlib_h = check_header("stdlib.h")