diff --git a/js/src/wasm/WasmInstance.cpp b/js/src/wasm/WasmInstance.cpp
index 8493d4d994e..a12cf979ea4 100644
--- a/js/src/wasm/WasmInstance.cpp
+++ b/js/src/wasm/WasmInstance.cpp
@@ -3895,6 +3895,8 @@ static bool WasmCall(JSContext* cx, unsigned argc, Value* vp) {
 
 bool Instance::getExportedFunction(JSContext* cx, uint32_t funcIndex,
                                    MutableHandleFunction result) {
+  MOZ_RELEASE_ASSERT(realm() == cx->realm());
+
   uint32_t funcExportIndex = codeMeta().findFuncExportIndex(funcIndex);
   FuncExportInstanceData& instanceData =
       funcExportInstanceData(funcExportIndex);
diff --git a/js/src/wasm/WasmTable.cpp b/js/src/wasm/WasmTable.cpp
index 2bcdcf43f23..daf45189206 100644
--- a/js/src/wasm/WasmTable.cpp
+++ b/js/src/wasm/WasmTable.cpp
@@ -19,12 +19,12 @@
 #include "mozilla/CheckedInt.h"
 
 #include "vm/JSContext.h"
-#include "vm/Realm.h"
 #include "wasm/WasmInstance.h"
 #include "wasm/WasmJS.h"
 #include "wasm/WasmValue.h"
 
 #include "gc/StableCellHasher-inl.h"
+#include "vm/Realm-inl.h"
 #include "wasm/WasmInstance-inl.h"
 
 using namespace js;
@@ -171,6 +171,7 @@ bool Table::getFuncRef(JSContext* cx, uint32_t address,
 
   Instance& instance = *elem.instance;
   const CodeRange& codeRange = *instance.code().lookupFuncRange(elem.code);
+  AutoRealmUnchecked ar(cx, instance.realm());
   return instance.getExportedFunction(cx, codeRange.funcIndex(), fun);
 }