qmake contains() doesn't work

[quimnuss]

I have this in my .pro:

message("Defines: $$DEFINES")
contains(DEFINES, USE_GAMEPAD)
{
    message("Building with XInput support")
    SOURCES += gamepad.cpp
    HEADERS += gamepad.h
}

message("Defines: $$DEFINES")
contains(DEFINES, USE_GAMEPAD)
{
    message("Building with XInput support")
    SOURCES += gamepad.cpp
    HEADERS += gamepad.h
}

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Running qmake outputs:

Project MESSAGE: Defines: UNICODE WIN32
Project MESSAGE: Building with XInput support

Project MESSAGE: Defines: UNICODE WIN32
Project MESSAGE: Building with XInput support

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USE_GAMEPAD is clearly not in the DEFINES and yet, it enters the scope. What am I doing wrong?

---

Added after 1 4 minutes:

Here's the correct syntax:

contains(DEFINES, "USE_GAMEPAD=1"):{
    message("Building with XInput support")
    SOURCES += gamepad.cpp
    HEADERS += gamepad.h
}

contains(DEFINES, "USE_GAMEPAD=1"):{
    message("Building with XInput support")
    SOURCES += gamepad.cpp
    HEADERS += gamepad.h
}

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The reason the previous wasn't working is either because of the missing semicolon or because USE_GAMEPAD was not defined so I guess it was checking contains(DEFINES, "") or something like that.