diff --git a/src/hw_ostc.h b/src/hw_ostc.h
index a0ce743..fc45182 100644
--- a/src/hw_ostc.h
+++ b/src/hw_ostc.h
@@ -36,7 +36,7 @@ dc_status_t
 hw_ostc_device_open (dc_device_t **device, dc_context_t *context, dc_iostream_t *iostream);
 
 dc_status_t
-hw_ostc_parser_create (dc_parser_t **parser, dc_context_t *context, unsigned int hwos);
+hw_ostc_parser_create (dc_parser_t **parser, dc_context_t *context);
 
 #ifdef __cplusplus
 }
diff --git a/src/hw_ostc_parser.c b/src/hw_ostc_parser.c
index 8c80588..5130d63 100644
--- a/src/hw_ostc_parser.c
+++ b/src/hw_ostc_parser.c
@@ -332,9 +332,9 @@ hw_ostc_parser_create_internal (dc_parser_t **out, dc_context_t *context, unsign
 
 
 dc_status_t
-hw_ostc_parser_create (dc_parser_t **out, dc_context_t *context, unsigned int hwos)
+hw_ostc_parser_create (dc_parser_t **out, dc_context_t *context)
 {
-	return hw_ostc_parser_create_internal (out, context, hwos, 0);
+	return hw_ostc_parser_create_internal (out, context, 0, 0);
 }
 
 dc_status_t
diff --git a/src/parser.c b/src/parser.c
index 6a236e6..9203490 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -132,7 +132,7 @@ dc_parser_new_internal (dc_parser_t **out, dc_context_t *context, dc_family_t fa
 		rc = mares_iconhd_parser_create (&parser, context, model);
 		break;
 	case DC_FAMILY_HW_OSTC:
-		rc = hw_ostc_parser_create (&parser, context, 0);
+		rc = hw_ostc_parser_create (&parser, context);
 		break;
 	case DC_FAMILY_HW_FROG:
 	case DC_FAMILY_HW_OSTC3: