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-rw-r--r--include/osmocore/protocol/gsm_03_41.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/osmocore/protocol/gsm_03_41.h b/include/osmocore/protocol/gsm_03_41.h
index 3b1b7c9f..54365cbc 100644
--- a/include/osmocore/protocol/gsm_03_41.h
+++ b/include/osmocore/protocol/gsm_03_41.h
@@ -40,7 +40,7 @@ struct gsm341_etws_message {
uint8_t data[0];
} __attribute__((packed));
-#define GSM341_MSG_CODE(ms) (ms->serial.code_lo | (msg->serial.code_hi << 4))
+#define GSM341_MSG_CODE(ms) ((ms)->serial.code_lo | ((ms)->serial.code_hi << 4))
/* Section 9.3.2.1 - Geographical Scope */
#define GSM341_GS_CELL_WIDE_IMMED 0