1 files changed, 1 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 532bdee83..958e99fd4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -816,7 +816,7 @@ main() { if (NSVersionOfRunTimeLibrary("System") >= (60 << 16))
             AC_DEFINE([SYS_RDOMAIN_LINUX], [1],
                 [Support routing domains using Linux VRF]), [], [
 #ifdef HAVE_SYS_TYPES_H
-# include <sys/types.H>
+# include <sys/types.h>
 #endif
             ])
         AC_CHECK_HEADERS([linux/seccomp.h linux/filter.h linux/audit.h], [],