diff --git a/Makefile.am b/Makefile.am
index 9c5d024..00ff0da 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -12,7 +12,7 @@ dist_man8_MANS=bgpq4.8
 bgpq4_LDADD = $(PLATFORM_LDADD) $(PROG_LDADD)
 bgpq4_LDADD += $(top_builddir)/compat/libcompat.la
 
-bgpq4_SOURCES=bgpq4.c bgpq4.h config.h bgpq4_printer.c bgpq_expander.c \
+bgpq4_SOURCES=bgpq4.c extern.h bgpq4_printer.c bgpq_expander.c \
     expander_freeall.c sx_maxsockbuf.c \
     sx_prefix.c sx_prefix.h sx_report.c sx_report.h \
     sx_slentry.c sx_slentry.h
diff --git a/bgpq4.c b/bgpq4.c
index 60e0e71..1f3cd04 100644
--- a/bgpq4.c
+++ b/bgpq4.c
@@ -41,7 +41,7 @@
 #include <strings.h>
 #include <unistd.h>
 
-#include "bgpq4.h"
+#include "extern.h"
 #include "sx_report.h"
 
 extern int debug_expander;
diff --git a/bgpq4_printer.c b/bgpq4_printer.c
index 416b5e0..aa5f173 100644
--- a/bgpq4_printer.c
+++ b/bgpq4_printer.c
@@ -38,7 +38,7 @@
 #include <string.h>
 #include <strings.h>
 
-#include "bgpq4.h"
+#include "extern.h"
 #include "sx_report.h"
 
 extern int debug_expander;
diff --git a/bgpq_expander.c b/bgpq_expander.c
index 526e70a..6f0ac75 100644
--- a/bgpq_expander.c
+++ b/bgpq_expander.c
@@ -49,7 +49,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 
-#include "bgpq4.h"
+#include "extern.h"
 #include "sx_report.h"
 
 int debug_expander = 0;
diff --git a/expander_freeall.c b/expander_freeall.c
index 247d505..843cb50 100644
--- a/expander_freeall.c
+++ b/expander_freeall.c
@@ -27,7 +27,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include <bgpq4.h>
+#include "extern.h"
 
 void
 sx_radix_node_freeall(struct sx_radix_node *n) {
diff --git a/bgpq4.h b/extern.h
similarity index 100%
rename from bgpq4.h
rename to extern.h