diff --git a/src/modules/module-protocol-pulse/modules/module-combine-sink.c b/src/modules/module-protocol-pulse/modules/module-combine-sink.c
index 4b3a2c3e2..6f5791ad0 100644
--- a/src/modules/module-protocol-pulse/modules/module-combine-sink.c
+++ b/src/modules/module-protocol-pulse/modules/module-combine-sink.c
@@ -436,15 +436,11 @@ struct module *create_module_combine_sink(struct impl *impl, const char *argumen
 		pw_properties_set(props, "slaves", NULL);
 	}
 
-	if ((str = pw_properties_get(props, "adjust_time")) != NULL) {
+	if (pw_properties_set(props, "adjust_time", NULL) != 0)
 		pw_log_info("The `adjust_time` modarg is ignored");
-		pw_properties_set(props, "adjust_time", NULL);
-	}
 
-	if ((str = pw_properties_get(props, "resample_method")) != NULL) {
+	if (pw_properties_set(props, "resample_method", NULL) != 0)
 		pw_log_info("The `resample_method` modarg is ignored");
-		pw_properties_set(props, "resample_method", NULL);
-	}
 
 	if (module_args_to_audioinfo(impl, props, &info) < 0) {
 		res = -EINVAL;