diff --git a/include/glibtop/Makefile.am b/include/glibtop/Makefile.am
index 6b80db09..6d394f89 100644
--- a/include/glibtop/Makefile.am
+++ b/include/glibtop/Makefile.am
@@ -8,4 +8,4 @@ glibtop_HEADERS		= close.h loadavg.h prockernel.h procstate.h \
 			  procsignal.h read_data.h union.h types.h gnuserv.h \
 			  parameter.h mountlist.h fsusage.h procmap.h signal.h \
 			  inodedb.h sysinfo.h ppp.h procargs.h netload.h \
-			  limits.h
+			  interfaces.h limits.h
diff --git a/include/glibtop/interfaces.h b/include/glibtop/interfaces.h
index a8ff5c3e..015b50b5 100644
--- a/include/glibtop/interfaces.h
+++ b/include/glibtop/interfaces.h
@@ -79,7 +79,7 @@ struct _glibtop_interface_names
 
 char *glibtop_get_interface_names_l (glibtop *server, glibtop_interface_names *buf, unsigned interface, unsigned number, unsigned strategy);
 
-#if GLIBTOP_SUID_INTERFACES
+#if GLIBTOP_SUID_INTERFACE_NAMES
 int glibtop_init_interface_names_p (glibtop *server);
 char *glibtop_get_interface_names_p (glibtop *server, glibtop_interface_names *buf, unsigned interface, unsigned number, unsigned strategy);
 #else