diff --git a/src/gsm/gsm_utils.c b/src/gsm/gsm_utils.c
index 9569cf3..fa77eae 100644
--- a/src/gsm/gsm_utils.c
+++ b/src/gsm/gsm_utils.c
@@ -241,6 +241,12 @@
 		result[z++] = cb;
 		shift++;
 	}
+	/* To avoid the situation where the receiving entity confuses 7 binary
+	 * zero pad bits as the @ character, the carriage return or <CR>
+	 * character (defined in subclause 7.1.1) shall be used for padding in
+	 * this situation. */
+	if (shift == 7)
+		result[z - 1] |= 0x1a;
 
 	free(data);