diff --git a/include/wx_cwc.pch b/include/wx_cwc.pch
index 99608bd5cc..e2416bb385 100644
--- a/include/wx_cwc.pch
+++ b/include/wx_cwc.pch
@@ -17,6 +17,5 @@
 #define wxUSE_GUI 1
 #define TARGET_CARBON 1
 #define OLDP2C 1
-#define PM_USE_SESSION_APIS 0
 
 #include "wx/wx_cw_cm.h"
diff --git a/include/wx_cwc.pch++ b/include/wx_cwc.pch++
index 7d5477abec..c461aa354d 100644
--- a/include/wx_cwc.pch++
+++ b/include/wx_cwc.pch++
@@ -17,7 +17,6 @@
 #define wxUSE_GUI 1
 #define TARGET_CARBON 1
 #define OLDP2C 1
-#define PM_USE_SESSION_APIS 0
 
 #include "wx/wx_cw_cm.h"
 #include "wx/wxprec.h"
\ No newline at end of file
diff --git a/include/wx_cwc_d.pch b/include/wx_cwc_d.pch
index 95d0c95d9b..d067e378f7 100644
--- a/include/wx_cwc_d.pch
+++ b/include/wx_cwc_d.pch
@@ -13,7 +13,6 @@
 #define wxUSE_GUI 1
 #define TARGET_CARBON 1
 #define OLDP2C 1
-#define PM_USE_SESSION_APIS 0
 
 #include "wx/wx_cw_cm.h"
 #ifdef __WXMSW__
diff --git a/include/wx_cwc_d.pch++ b/include/wx_cwc_d.pch++
index e8a4dab532..fce9c9b1b6 100644
--- a/include/wx_cwc_d.pch++
+++ b/include/wx_cwc_d.pch++
@@ -15,7 +15,6 @@
 #define wxUSE_GUI 1
 #define TARGET_CARBON 1
 #define OLDP2C 1
-#define PM_USE_SESSION_APIS 0
 
 #include "wx/wx_cw_cm.h"
 #ifdef WX_PRECOMP