diff --git a/src/win/winapi.h b/src/win/winapi.h
index e023beed..003c14ba 100644
--- a/src/win/winapi.h
+++ b/src/win/winapi.h
@@ -4073,6 +4073,25 @@
         ((NTSTATUS) (error)) : ((NTSTATUS) (((error) & 0x0000FFFF) | \
         (FACILITY_NTWIN32 << 16) | ERROR_SEVERITY_WARNING)))
 
+#ifndef JOB_OBJECT_LIMIT_PROCESS_MEMORY
+# define JOB_OBJECT_LIMIT_PROCESS_MEMORY             0x00000100
+#endif
+#ifndef JOB_OBJECT_LIMIT_JOB_MEMORY
+# define JOB_OBJECT_LIMIT_JOB_MEMORY                 0x00000200
+#endif
+#ifndef JOB_OBJECT_LIMIT_DIE_ON_UNHANDLED_EXCEPTION
+# define JOB_OBJECT_LIMIT_DIE_ON_UNHANDLED_EXCEPTION 0x00000400
+#endif
+#ifndef JOB_OBJECT_LIMIT_BREAKAWAY_OK
+# define JOB_OBJECT_LIMIT_BREAKAWAY_OK               0x00000800
+#endif
+#ifndef JOB_OBJECT_LIMIT_SILENT_BREAKAWAY_OK
+# define JOB_OBJECT_LIMIT_SILENT_BREAKAWAY_OK        0x00001000
+#endif
+#ifndef JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE
+# define JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE          0x00002000
+#endif
+
 /* from ntifs.h */
 /* MinGW already has it, mingw-w64 does not. */
 #if defined(_MSC_VER) || defined(__MINGW64_VERSION_MAJOR)