diff --git a/src/uwatec_smart_parser.c b/src/uwatec_smart_parser.c
index 5f571bb..addc295 100644
--- a/src/uwatec_smart_parser.c
+++ b/src/uwatec_smart_parser.c
@@ -363,6 +363,9 @@ uwatec_smart_parser_get_field (dc_parser_t *abstract, dc_field_type_t type, unsi
 	unsigned int trimix = 0;
 
 	if (parser->model == GALILEOTRIMIX) {
+		if (size < 44)
+			return DC_STATUS_DATAFORMAT;
+
 		if (data[43] & 0x80) {
 			header = 0xB1;
 			trimix = 1;
@@ -473,6 +476,9 @@ uwatec_smart_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t
 	unsigned int trimix = 0;
 
 	if (parser->model == GALILEOTRIMIX) {
+		if (size < 44)
+			return DC_STATUS_DATAFORMAT;
+
 		if (data[43] & 0x80) {
 			header = 0xB1;
 			trimix = 1;