diff --git a/aclocal.m4 b/aclocal.m4
index 66b8eac..6824e99 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -138,11 +138,13 @@ fi)])
 dnl --------------------------------------------------------------------------
 dnl  PA_HEADER_DEFINES
 dnl
-dnl  PA_HEADER_DEFINES(headers, type, value)
+dnl  PA_HEADER_DEFINES(header, type, value)
 dnl --------------------------------------------------------------------------
 AC_DEFUN(PA_HEADER_DEFINES,
-[AC_MSG_CHECKING([for definition of $3])
- AC_TRY_COMPILE([$1],
+[AC_MSG_CHECKING([if $1 defines $3])
+ AC_TRY_COMPILE([
+#include <$1>
+],
 [
 int main()
 {
diff --git a/configure.in b/configure.in
index cb20df5..213dade 100644
--- a/configure.in
+++ b/configure.in
@@ -39,7 +39,7 @@ AC_CHECK_FUNCS(setregid)
 PA_MSGHDR_MSG_CONTROL
 PA_STRUCT_IN_PKTINFO
 
-PA_HEADER_DEFINES([#include <netinet/in.h>], int, IPPORT_TFTP)
+PA_HEADER_DEFINES(netinet/in.h, int, IPPORT_TFTP)
 
 PA_WITH_BOOL(tcpwrappers, 1,
 [ --without-tcpwrappers	Disable tcpwrapper permissions checking],