diff --git a/channels/Makefile b/channels/Makefile
index 1695cec664e5c45a03c6b0e12fcaa4ce07a4ca51..314a9ee6166441b6f4555bba2ab5dafb5fd42db7 100644
--- a/channels/Makefile
+++ b/channels/Makefile
@@ -92,10 +92,12 @@ ifneq ($(wildcard $(CROSS_COMPILE_TARGET)/usr/include/alsa/asoundlib.h),)
   CHANNEL_LIBS+=chan_alsa.so
 endif
 
+ifndef WITHOUT_PRI
 ifneq ($(wildcard $(CROSS_COMPILE_TARGET)/usr/lib/libpri.so.1)$(wildcard $(CROSS_COMPILE_TARGET)/usr/local/lib/libpri.so.1),)
   CFLAGS+=-DZAPATA_PRI
   ZAPPRI=-lpri
 endif
+endif # WITHOUT_PRI
 
 ifneq ($(wildcard $(CROSS_COMPILE_TARGET)/usr/lib/libmfcr2.so.1)$(wildcard $(CROSS_COMPILE_TARGET)/usr/local/lib/libmfcr2.so.1),)
   CFLAGS+=-DZAPATA_R2