diff --git a/src/Win32_Interop/win32_rfdmap.cpp b/src/Win32_Interop/win32_rfdmap.cpp
index 9eb9d235..66167a81 100644
--- a/src/Win32_Interop/win32_rfdmap.cpp
+++ b/src/Win32_Interop/win32_rfdmap.cpp
@@ -157,16 +157,10 @@ int RFDMap::lookupPosixFD(RFD rfd) {
     return posixFD;
 }
 
-bool RFDMap::SetSocketFlags(SOCKET s, int flags) {
-    bool result = false;
+void RFDMap::SetSocketFlags(SOCKET s, int flags) {
     EnterCriticalSection(&mutex);
-    SocketToFlagsMapType::iterator sit = SocketToFlagsMap.find(s);
-    if (sit != SocketToFlagsMap.end()) {
-        SocketToFlagsMap[s] = flags;
-        result = true;
-    }
+    SocketToFlagsMap[s] = flags;
     LeaveCriticalSection(&mutex);
-    return result;
 }
 
 int RFDMap::GetSocketFlags(SOCKET s) {
diff --git a/src/Win32_Interop/win32_rfdmap.h b/src/Win32_Interop/win32_rfdmap.h
index ed28083a..b064df24 100644
--- a/src/Win32_Interop/win32_rfdmap.h
+++ b/src/Win32_Interop/win32_rfdmap.h
@@ -116,6 +116,6 @@ public:
     /* Returns the socket associated with a file descriptor. */
     int lookupPosixFD(RFD rfd);
 
-    bool SetSocketFlags(SOCKET s, int flags);
+    void SetSocketFlags(SOCKET s, int flags);
     int GetSocketFlags(SOCKET s);
 };