diff --git a/include/sksl/DSLBlock.h b/include/sksl/DSLBlock.h
index c20c864..c2ad7de 100644
--- a/include/sksl/DSLBlock.h
+++ b/include/sksl/DSLBlock.h
@@ -16,6 +16,7 @@
 
 namespace SkSL {
 
+class SymbolTable;
 class Statement;
 
 namespace dsl {