diff --git a/src/oceanic_atom2_parser.c b/src/oceanic_atom2_parser.c
index 491e74b..8482f46 100644
--- a/src/oceanic_atom2_parser.c
+++ b/src/oceanic_atom2_parser.c
@@ -199,7 +199,7 @@ oceanic_atom2_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetim
 			datetime->year   = ((p[3] & 0xE0) >> 1) + (p[4] & 0x0F) + 2000;
 			datetime->month  = (p[4] & 0xF0) >> 4;
 			datetime->day    = p[3] & 0x1F;
-			datetime->hour   = bcd2dec (p[1] & 0x7F);
+			datetime->hour   = bcd2dec (p[1] & 0x1F);
 			datetime->minute = bcd2dec (p[0]);
 			break;
 		case ZENAIR: