diff --git a/winsup/cygwin/exceptions.cc b/winsup/cygwin/exceptions.cc
index 28d0431d5..3195d5719 100644
--- a/winsup/cygwin/exceptions.cc
+++ b/winsup/cygwin/exceptions.cc
@@ -665,7 +665,7 @@ exception::handle (EXCEPTION_RECORD *e, exception_list *frame, CONTEXT *in,
   siginfo_t si = {};
   si.si_code = SI_KERNEL;
   /* Coerce win32 value to posix value.  */
-  switch (e->ExceptionCode)
+  switch ((NTSTATUS) e->ExceptionCode)
     {
     case STATUS_FLOAT_DIVIDE_BY_ZERO:
       si.si_signo = SIGFPE;
diff --git a/winsup/cygwin/local_includes/ntdll.h b/winsup/cygwin/local_includes/ntdll.h
index 7737ae503..4497fe53f 100644
--- a/winsup/cygwin/local_includes/ntdll.h
+++ b/winsup/cygwin/local_includes/ntdll.h
@@ -23,7 +23,7 @@ extern GUID __cygwin_socket_guid;
 /* Custom Cygwin-only status codes. */
 #define STATUS_THREAD_SIGNALED	((NTSTATUS)0xe0000001)
 #define STATUS_THREAD_CANCELED	((NTSTATUS)0xe0000002)
-#define STATUS_ILLEGAL_DLL_PSEUDO_RELOCATION ((DWORD) 0xe0000269)
+#define STATUS_ILLEGAL_DLL_PSEUDO_RELOCATION ((NTSTATUS) 0xe0000269)
 
 /* Simplify checking for a transactional error code. */
 #define NT_TRANSACTIONAL_ERROR(s)	\
diff --git a/winsup/cygwin/pinfo.cc b/winsup/cygwin/pinfo.cc
index 7f1f41d79..e31a67d8f 100644
--- a/winsup/cygwin/pinfo.cc
+++ b/winsup/cygwin/pinfo.cc
@@ -118,7 +118,7 @@ pinfo_init (char **envp, int envc)
 DWORD
 pinfo::status_exit (DWORD x)
 {
-  switch (x)
+  switch ((NTSTATUS) x)
     {
     case STATUS_DLL_NOT_FOUND:
       {
diff --git a/winsup/cygwin/sigproc.cc b/winsup/cygwin/sigproc.cc
index 86e4e607a..99fa3c342 100644
--- a/winsup/cygwin/sigproc.cc
+++ b/winsup/cygwin/sigproc.cc
@@ -1082,7 +1082,7 @@ child_info::proc_retry (HANDLE h)
   if (!exit_code)
     return EXITCODE_OK;
   sigproc_printf ("exit_code %y", exit_code);
-  switch (exit_code)
+  switch ((NTSTATUS) exit_code)
     {
     case STILL_ACTIVE:	/* shouldn't happen */
       sigproc_printf ("STILL_ACTIVE?  How'd we get here?");