diff --git a/src/coreclr/jit/codegenarm64.cpp b/src/coreclr/jit/codegenarm64.cpp
index ca810ddd1b77b0..b13c11c50d6681 100644
--- a/src/coreclr/jit/codegenarm64.cpp
+++ b/src/coreclr/jit/codegenarm64.cpp
@@ -1454,6 +1454,10 @@ void CodeGen::genFuncletProlog(BasicBlock* block)
 
         if (compiler->opts.IsOSR())
         {
+            // With OSR we may see large values for fiSpDelta1.
+            // We repurpose genAllocLclFram to do the necessary probing.
+            bool scratchRegIsZero = false;
+            genAllocLclFrame(-genFuncletInfo.fiSpDelta1, REG_SCRATCH, &scratchRegIsZero, maskArgRegsLiveIn);
             genStackPointerAdjustment(genFuncletInfo.fiSpDelta1, REG_SCRATCH, nullptr, /* reportUnwindData */ true);
         }
         else