Index: ipgrab-0.9.10/debian/rules
===================================================================
--- ipgrab-0.9.10.orig/debian/rules
+++ ipgrab-0.9.10/debian/rules
@@ -8,6 +8,8 @@
 # This is the debhelper compatability version to use.
 #export DH_COMPAT=3
 
+export CFLAGS=-std=gnu89
+
 configure: configure-stamp
 configure-stamp:
 	dh_testdir