--- ez-ipupdate-3.0.11b8.orig/configure.in
+++ ez-ipupdate-3.0.11b8/configure.in
@@ -58,10 +58,12 @@
 dnl Checks for header files.
 AC_CHECK_HEADERS( arpa/inet.h \
 		  sys/types.h \
+		  time.h \
 		  sys/time.h \
 		  sys/stat.h \
 		  fcntl.h \
 		  signal.h \
+		  string.h \
 		  syslog.h \
 		  pwd.h \
 		  stdarg.h \