diff --git a/channels/chan_zap.c b/channels/chan_zap.c
index 63270fb7bd..f2be863365 100755
--- a/channels/chan_zap.c
+++ b/channels/chan_zap.c
@@ -58,6 +58,9 @@
 #ifndef PRI_NSF_NONE
 #error "You need newer libpri"
 #endif
+#ifndef PRI_SWITCH_QSIG
+#error "You need newer libpri"
+#endif
 #endif
 #ifdef ZAPATA_R2
 #include <libmfcr2.h>