diff --git a/Userland/Libraries/LibWasm/Printer/Printer.h b/Userland/Libraries/LibWasm/Printer/Printer.h
index 0fae07ff8c..06913beb54 100644
--- a/Userland/Libraries/LibWasm/Printer/Printer.h
+++ b/Userland/Libraries/LibWasm/Printer/Printer.h
@@ -10,6 +10,7 @@
 
 namespace Wasm {
 
+class Reference;
 class Value;
 
 String instruction_name(OpCode const& opcode);