diff --git a/src/debuginfo.cpp b/src/debuginfo.cpp
index 5388dbb1611fd..eadd98437a638 100644
--- a/src/debuginfo.cpp
+++ b/src/debuginfo.cpp
@@ -969,6 +969,8 @@ class JITMemoryManagerWin : public JITMemoryManager {
   virtual uint8_t *getGOTBase() const { return JMM->getGOTBase(); }
   virtual uint8_t *startFunctionBody(const Function *F,
                                      uintptr_t &ActualSize) {
+      if (ActualSize == 0)
+          ActualSize += 64;
       ActualSize += 48;
       uint8_t *mem = JMM->startFunctionBody(F,ActualSize);
       ActualSize -= 48;