diff --git a/src/coreclr/jit/codegenwasm.cpp b/src/coreclr/jit/codegenwasm.cpp
index 4df06a6e5d22b0..3d7edebd7c387c 100644
--- a/src/coreclr/jit/codegenwasm.cpp
+++ b/src/coreclr/jit/codegenwasm.cpp
@@ -13,6 +13,8 @@
 #include "gcinfoencoder.h"
 
 static const int LINEAR_MEMORY_INDEX = 0;
+// stackPointer is the 0th global in our generated Wasm modules
+static const int STACK_POINTER_GLOBAL = 0;
 
 #ifdef TARGET_64BIT
 static const instruction INS_I_load  = INS_i64_load;
@@ -144,16 +146,20 @@ void CodeGen::genAllocLclFrame(unsigned frameSize, regNumber initReg, bool* pIni
 
     m_compiler->unwindAllocStack(frameSize);
 
-    // TODO-WASM: reverse pinvoke frame allocation
-    //
+    unsigned initialSPLclIndex;
+    unsigned spLclIndex = WasmRegToIndex(spReg);
     if (!m_compiler->lvaGetDesc(m_compiler->lvaWasmSpArg)->lvIsParam)
     {
-        NYI_WASM("alloc local frame for reverse pinvoke");
+        initialSPLclIndex = spLclIndex;
+        GetEmitter()->emitIns_I(INS_global_get, EA_PTRSIZE, STACK_POINTER_GLOBAL);
+        GetEmitter()->emitIns_I(INS_local_set, EA_PTRSIZE, initialSPLclIndex);
+    }
+    else
+    {
+        initialSPLclIndex =
+            WasmRegToIndex(m_compiler->lvaGetParameterABIInfo(m_compiler->lvaWasmSpArg).Segment(0).GetRegister());
     }
 
-    unsigned initialSPLclIndex =
-        WasmRegToIndex(m_compiler->lvaGetParameterABIInfo(m_compiler->lvaWasmSpArg).Segment(0).GetRegister());
-    unsigned spLclIndex = WasmRegToIndex(spReg);
     assert(initialSPLclIndex == spLclIndex);
     if (frameSize != 0)
     {