diff --git a/include/osmocom/core/gsmtap.h b/include/osmocom/core/gsmtap.h
index dbc3d31..5dc869d 100644
--- a/include/osmocom/core/gsmtap.h
+++ b/include/osmocom/core/gsmtap.h
@@ -77,11 +77,11 @@
 #define GSMTAP_CHANNEL_SDCCH8	0x08
 #define GSMTAP_CHANNEL_TCH_F	0x09
 #define GSMTAP_CHANNEL_TCH_H	0x0a
-#define GSMTAP_CHANNEL_CBCH51	0x0b
+#define GSMTAP_CHANNEL_PACCH	0x0b
 #define GSMTAP_CHANNEL_CBCH52	0x0c
 #define GSMTAP_CHANNEL_PDCH	0x0d
 #define GSMTAP_CHANNEL_PTCCH	0x0e
-#define GSMTAP_CHANNEL_PACCH	0x0f
+#define GSMTAP_CHANNEL_CBCH51	0x0f
 #define GSMTAP_CHANNEL_ACCH	0x80
 
 /* ====== DO NOT MAKE UNAPPROVED MODIFICATIONS HERE ===== */