diff --git a/configure.ac b/configure.ac
index 8c7dfab..7e47719 100644
--- a/configure.ac
+++ b/configure.ac
@@ -339,6 +339,7 @@ AC_CHECK_HEADERS(\
 	sys/param.h \
 	sys/poll.h \
 	sys/prctl.h \
+	sys/protosw.h \
 	sys/ptrace.h \
 	sys/reg.h \
 	sys/resource.h \
diff --git a/dlls/iphlpapi/ipstats.c b/dlls/iphlpapi/ipstats.c
index 85f91e2..19b153a 100644
--- a/dlls/iphlpapi/ipstats.c
+++ b/dlls/iphlpapi/ipstats.c
@@ -98,6 +98,9 @@
 #include <netinet/udp_var.h>
 #endif
 
+#ifdef HAVE_SYS_PROTOSW_H
+#include <sys/protosw.h>
+#endif
 #ifdef HAVE_SYS_SYSCTL_H
 #include <sys/sysctl.h>
 #endif
diff --git a/include/config.h.in b/include/config.h.in
index 69c1fee..bebe0eb 100644
--- a/include/config.h.in
+++ b/include/config.h.in
@@ -846,6 +846,9 @@
 /* Define to 1 if you have the <sys/prctl.h> header file. */
 #undef HAVE_SYS_PRCTL_H
 
+/* Define to 1 if you have the <sys/protosw.h> header file. */
+#undef HAVE_SYS_PROTOSW_H
+
 /* Define to 1 if you have the <sys/ptrace.h> header file. */
 #undef HAVE_SYS_PTRACE_H