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-rw-r--r--channels/chan_zap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/channels/chan_zap.c b/channels/chan_zap.c
index babaeb7f2..adc6217c9 100644
--- a/channels/chan_zap.c
+++ b/channels/chan_zap.c
@@ -107,7 +107,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#define SMDI_MD_WAIT_TIMEOUT 1500 /* 1.5 seconds */
#endif
-#ifndef ZT_SIG_HARDHDLC
+#if !defined(ZT_SIG_EM_E1) || (defined(ZAPATA_PRI) && !defined(ZT_SIG_HARDHDLC))
#error "Your zaptel is too old. please update"
#endif