diff --git a/gtk2_ardour/plugin_eq_gui.cc b/gtk2_ardour/plugin_eq_gui.cc
index 9a91d0c124..306746d556 100644
--- a/gtk2_ardour/plugin_eq_gui.cc
+++ b/gtk2_ardour/plugin_eq_gui.cc
@@ -18,6 +18,9 @@
 
 */
 
+#include <iostream>
+#include <cmath>
+
 #ifdef COMPILER_MSVC
 #include <float.h>
 /* isinf() & isnan() are C99 standards, which older MSVC doesn't provide */
@@ -25,22 +28,24 @@
 #define isnan(val) (bool)_isnan((double)val)
 #endif
 
-#include "plugin_eq_gui.h"
-#include "fft.h"
-
-#include "ardour_ui.h"
-#include "gui_thread.h"
-#include "ardour/audio_buffer.h"
-#include "ardour/data_type.h"
-#include "ardour/chan_mapping.h"
-#include "ardour/session.h"
+#ifdef __APPLE__
+#define isinf(val) std::isinf((val))
+#define isnan(val) std::isnan((val))
+#endif
 
 #include <gtkmm/box.h>
 #include <gtkmm/button.h>
 #include <gtkmm/checkbutton.h>
 
-#include <iostream>
-#include <cmath>
+#include "ardour/audio_buffer.h"
+#include "ardour/data_type.h"
+#include "ardour/chan_mapping.h"
+#include "ardour/session.h"
+
+#include "plugin_eq_gui.h"
+#include "fft.h"
+#include "ardour_ui.h"
+#include "gui_thread.h"
 
 #include "i18n.h"