diff --git a/source/io/FileIO.cpp b/source/io/FileIO.cpp
index ec6699c6d..b2a423fed 100644
--- a/source/io/FileIO.cpp
+++ b/source/io/FileIO.cpp
@@ -421,7 +421,7 @@ DEFINE_VIREO_BEGIN(FileSystem)
 #endif
     //--------
 #if kVireoOS_emscripten
-    DEFINE_VIREO_FUNCTION(SystemLogging_WriteMessageUTF8, "p(i(.String) i(.String) i(.String) i(.Int32) io(" ERROR_CLUST_TYPE_STRING "))")
+    DEFINE_VIREO_FUNCTION(SystemLogging_WriteMessageUTF8, "p(i(.String) i(.String) i(.String) i(.Int32) io(ErrorCluster))")
 #endif
     //--------
 #ifdef VIREO_FILESYSTEM