diff --git a/source_modules/rfspace_source/src/rfspace_client.cpp b/source_modules/rfspace_source/src/rfspace_client.cpp
index 28f1ffeb..6b7226a5 100644
--- a/source_modules/rfspace_source/src/rfspace_client.cpp
+++ b/source_modules/rfspace_source/src/rfspace_client.cpp
@@ -138,7 +138,7 @@ namespace rfspace {
     }
 
     void RFspaceClientClass::start(SampleFormat sampleFormat, SampleDepth sampleDepth) {
-        uint8_t args[4] = { sampleFormat, RFSPACE_STATE_RUN, sampleDepth, 0 };
+        uint8_t args[4] = { (uint8_t)sampleFormat, (uint8_t)RFSPACE_STATE_RUN, (uint8_t)sampleDepth, 0 };
         setControlItem(RFSPACE_CTRL_ITEM_STATE, args, sizeof(args));
     }
 
@@ -224,4 +224,4 @@ namespace rfspace {
         if (!udpConn) { return NULL; }
         return RFspaceClient(new RFspaceClientClass(std::move(conn), std::move(udpConn), out));
     }
-}
\ No newline at end of file
+}