diff --git a/src/process-monitor.c b/src/process-monitor.c
index 0dd6568..0ef954b 100644
--- a/src/process-monitor.c
+++ b/src/process-monitor.c
@@ -59,7 +59,7 @@ xtm_process_monitor_class_init (XtmProcessMonitorClass *klass)
 	xtm_process_monitor_parent_class = g_type_class_peek_parent (klass);
 	class->get_property = xtm_process_monitor_get_property;
 	class->set_property = xtm_process_monitor_set_property;
-#if HAVE_GTK3
+#ifdef HAVE_GTK3
 	widget_class->draw = xtm_process_monitor_expose;
 #else
 	widget_class->expose_event = xtm_process_monitor_expose;
diff --git a/src/process-statusbar.c b/src/process-statusbar.c
index 376e408..01a46e1 100644
--- a/src/process-statusbar.c
+++ b/src/process-statusbar.c
@@ -100,7 +100,7 @@ xtm_process_statusbar_init (XtmProcessStatusbar *statusbar)
 	}
 #endif
 
-#if HAVE_GTK3
+#ifdef HAVE_GTK3
 	hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 16);
 #else
 	hbox = gtk_hbox_new (FALSE, 16);