diff --git a/modules/juce_core/native/juce_win32_Threads.cpp b/modules/juce_core/native/juce_win32_Threads.cpp
index 03ed62cd34..7d2003fc39 100644
--- a/modules/juce_core/native/juce_win32_Threads.cpp
+++ b/modules/juce_core/native/juce_win32_Threads.cpp
@@ -457,11 +457,11 @@ public:
             STARTUPINFOW startupInfo = { 0 };
             startupInfo.cb = sizeof (startupInfo);
 
-            startupInfo.hStdOutput = (streamFlags | wantStdOut) != 0 ? writePipe : 0;
-            startupInfo.hStdError  = (streamFlags | wantStdErr) != 0 ? writePipe : 0;
+            startupInfo.hStdOutput = (streamFlags & wantStdOut) != 0 ? writePipe : 0;
+            startupInfo.hStdError  = (streamFlags & wantStdErr) != 0 ? writePipe : 0;
             startupInfo.dwFlags = STARTF_USESTDHANDLES;
 
-            ok = CreateProcess (nullptr, const_cast <LPWSTR> (command.toWideCharPointer()),
+            ok = CreateProcess (nullptr, const_cast<LPWSTR> (command.toWideCharPointer()),
                                 nullptr, nullptr, TRUE, CREATE_NO_WINDOW | CREATE_UNICODE_ENVIRONMENT,
                                 nullptr, nullptr, &startupInfo, &processInfo) != FALSE;
         }