--- pyiwscan.c
+++ pyiwscan.c
@@ -13,6 +13,11 @@
 #include <structmember.h>
 #include <iwlib.h>
 
+/* PROC_NET_WIRELESS is defined in iwlib-private.h since wireless-tools-30_pre9 */
+#ifndef PROC_NET_WIRELESS
+#define PROC_NET_WIRELESS "/proc/net/wireless"
+#endif
+
 #define IWSCAN_VERSION_MAJOR  0
 #define IWSCAN_VERSION_MINOR  7
 #define IWSCAN_VERSION_MICRO  0