diff --git a/sys/netinet/in_systm.h b/sys/netinet/in_systm.h
index 77c66c479b7..e61101916ee 100644
--- a/sys/netinet/in_systm.h
+++ b/sys/netinet/in_systm.h
@@ -34,6 +34,8 @@
 #ifndef _NETINET_IN_SYSTM_H_
 #define _NETINET_IN_SYSTM_H_
 
+#include <sys/types.h>
+
 /*
  * Miscellaneous internetwork
  * definitions for kernel.
diff --git a/tools/build/test-includes/badfiles.inc b/tools/build/test-includes/badfiles.inc
index 21657bfef4e..297b0020788 100644
--- a/tools/build/test-includes/badfiles.inc
+++ b/tools/build/test-includes/badfiles.inc
@@ -257,7 +257,6 @@ BADHDRS= \
 	netinet/in_pcb.h \
 	netinet/in_pcb_var.h \
 	netinet/in_rss.h \
-	netinet/in_systm.h \
 	netinet/in_var.h \
 	netinet/ip.h \
 	netinet/ip6.h \