--- a/src/cxa_exception.h
+++ b/src/cxa_exception.h
@@ -27,6 +27,13 @@ _LIBCXXABI_HIDDEN uint64_t __getExceptio
 _LIBCXXABI_HIDDEN void     __setExceptionClass  (      _Unwind_Exception*, uint64_t);
 _LIBCXXABI_HIDDEN bool     __isOurExceptionClass(const _Unwind_Exception*);
 
+#if defined(__arm__) && defined(__GNUC__)
+// missing values from _Unwind_Reason_Code enum
+#define _URC_FATAL_PHASE2_ERROR ((_Unwind_Reason_Code)2)
+#define _URC_FATAL_PHASE1_ERROR ((_Unwind_Reason_Code)3)
+#define _URC_NORMAL_STOP ((_Unwind_Reason_Code)4)
+#endif
+
 struct _LIBCXXABI_HIDDEN __cxa_exception {
 #if defined(__LP64__) || defined(_WIN64) || defined(_LIBCXXABI_ARM_EHABI)
     // Now _Unwind_Exception is marked with __attribute__((aligned)),
--- a/src/cxa_personality.cpp
+++ b/src/cxa_personality.cpp
@@ -1108,7 +1108,7 @@ __gxx_personality_v0(_Unwind_State state
 
     // Check the undocumented force unwinding behavior
     bool is_force_unwinding = state & _US_FORCE_UNWIND;
-    state &= ~_US_FORCE_UNWIND;
+    state = (_Unwind_State)(state & ~_US_FORCE_UNWIND);
 
     scan_results results;
     switch (state) {