diff --git a/include/swift/SIL/SILConstants.h b/include/swift/SIL/SILConstants.h
index a3b7909a4e00e..1de41b8805856 100644
--- a/include/swift/SIL/SILConstants.h
+++ b/include/swift/SIL/SILConstants.h
@@ -556,7 +556,7 @@ class SymbolicValue {
   void dump() const;
 };
 
-static_assert(sizeof(SymbolicValue) == 2 * sizeof(void *),
+static_assert(sizeof(SymbolicValue) == 2 * sizeof(uint64_t),
               "SymbolicValue should stay small");
 static_assert(std::is_pod<SymbolicValue>::value,
               "SymbolicValue should stay POD");