diff --git a/source/theme/Makefile b/source/theme/Makefile
index 944e2f1e2..b6d29ae1b 100644
--- a/source/theme/Makefile
+++ b/source/theme/Makefile
@@ -28,6 +28,7 @@ QT5_LINK_FLAGS = $(NON_STATIC_LINK_FLAGS) $(shell pkg-config --libs Qt5Core Qt5G
 QT5_STYLES_DIR = $(shell pkg-config --variable=libdir Qt5Core)/qt5/plugins/styles
 else
 ifeq ($(MACOS),true)
+ifneq ($(MACOS_OLD),true)
 ifeq ($(HAVE_PYQT),true)
 HAVE_QT5=true
 QT5_PREFIX     = $(shell pkg-config --variable=prefix Qt5OpenGLExtensions)
@@ -37,6 +38,7 @@ QT5_STYLES_DIR = $(QT5_PREFIX)/lib/qt5/plugins/styles
 endif
 endif
 endif
+endif
 
 # ---------------------------------------------------------------------------------------------------------------------