diff --git a/setup/build_environment.py b/setup/build_environment.py
index ff549692d7..ae0648ff52 100644
--- a/setup/build_environment.py
+++ b/setup/build_environment.py
@@ -37,7 +37,7 @@ QMAKE = os.environ.get('QMAKE', QMAKE)
 
 PKGCONFIG = find_executable('pkg-config')
 PKGCONFIG = os.environ.get('PKG_CONFIG', PKGCONFIG)
-if islinux or ishaiku and not PKGCONFIG:
+if (islinux or ishaiku) and not PKGCONFIG:
     raise SystemExit('Failed to find pkg-config on your system. You can use the environment variable PKG_CONFIG to point to the pkg-config executable')
 
 def run_pkgconfig(name, envvar, default, flag, prefix):