diff --git a/stm-firmware/temp-profile/temp-profile-parser.c b/stm-firmware/temp-profile/temp-profile-parser.c
index 28b9d7a..a87e9b2 100644
--- a/stm-firmware/temp-profile/temp-profile-parser.c
+++ b/stm-firmware/temp-profile/temp-profile-parser.c
@@ -141,6 +141,10 @@ static int parse_line(char *line, struct pl_command *cmd)
 		switch (token_idx) {
 		case 0:
 			map = string_to_command(token);
+			if (!map) {
+				/* No valid command found */
+				return -1;
+			}
 			c.cmd = map->command;
 			break;
 		default: