diff --git a/clang/lib/Checker/BasicStore.cpp b/clang/lib/Checker/BasicStore.cpp
index d93a6658c681..10136f3fc45b 100644
--- a/clang/lib/Checker/BasicStore.cpp
+++ b/clang/lib/Checker/BasicStore.cpp
@@ -142,7 +142,8 @@ SVal BasicStoreManager::LazyRetrieve(Store store, const TypedRegion *R) {
 
   // Globals and parameters start with symbolic values.
   // Local variables initially are undefined.
-  if (VR->hasGlobalsOrParametersStorage())
+  if (VR->hasGlobalsOrParametersStorage() ||
+      isa<UnknownSpaceRegion>(VR->getMemorySpace()))
     return ValMgr.getRegionValueSymbolVal(R);
   return UndefinedVal();
 }