diff --git a/src/conf_post.h b/src/conf_post.h
index 78b542d69d3..e2addf37103 100644
--- a/src/conf_post.h
+++ b/src/conf_post.h
@@ -426,10 +426,17 @@ extern int gl_consolesafe_vprintf (const char *restrict format, va_list args)
 # endif	/* !_UCRT */
 #endif	/* WINDOWSNT */
 
-#if defined WINDOWSNT && !defined HAVE_DECL_GETDELIM
+#if defined WINDOWSNT
 /* MinGW64 doesn't have getdelim, called by Gnulib's getline, but the
    MS-Windows build omits stdio.h module, where getdelim is declared.  */
-# include <stdio.h>
-# include <stddef.h>
+# if !(defined HAVE_DECL_GETDELIM && defined HAVE_DECL_GETLINE)
+#  include <stdio.h>
+#  include <stddef.h>
+#  if !defined HAVE_DECL_GETDELIM
 extern ssize_t getdelim (char **, size_t *, int, FILE *);
+#  endif
+#  if !defined HAVE_DECL_GETLINE
+extern ssize_t getline (char **, size_t *, FILE *);
+#  endif
+# endif
 #endif