diff --git a/CFStream.c b/CFStream.c
index f72e46d..33ec8d1 100644
--- a/CFStream.c
+++ b/CFStream.c
@@ -360,6 +360,8 @@ CONST_STRING_DECL(kCFStreamPropertySocketRemotePortNumber, "kCFStreamPropertySoc
 CONST_STRING_DECL(kCFStreamPropertyDataWritten, "kCFStreamPropertyDataWritten")
 CONST_STRING_DECL(kCFStreamPropertyAppendToFile, "kCFStreamPropertyAppendToFile")
 
+CONST_STRING_DECL(kCFStreamPropertySourceApplication, "kCFStreamPropertySourceApplication")
+
 CF_PRIVATE void __CFStreamInitialize(void) {
     static dispatch_once_t initOnce;
     dispatch_once(&initOnce, ^{ __kCFReadStreamTypeID = _CFRuntimeRegisterClass(&__CFReadStreamClass); __kCFWriteStreamTypeID = _CFRuntimeRegisterClass(&__CFWriteStreamClass); });
diff --git a/include/CoreFoundation/CFStream.h b/include/CoreFoundation/CFStream.h
index 16a37f2..a3f9fcf 100644
--- a/include/CoreFoundation/CFStream.h
+++ b/include/CoreFoundation/CFStream.h
@@ -129,6 +129,9 @@ const CFStringRef kCFStreamPropertySocketRemoteHostName;
 CF_EXPORT
 const CFStringRef kCFStreamPropertySocketRemotePortNumber;
 
+CF_EXPORT
+const CFStringRef kCFStreamPropertySourceApplication;
+
 CF_IMPLICIT_BRIDGING_DISABLED
 /* Socket streams; the returned streams are paired such that they use the same socket; pass NULL if you want only the read stream or the write stream */
 CF_EXPORT