diff --git a/contrib/src/stc/gen_iface.py b/contrib/src/stc/gen_iface.py
index 95c039f7a6..3da52f8420 100644
--- a/contrib/src/stc/gen_iface.py
+++ b/contrib/src/stc/gen_iface.py
@@ -488,13 +488,13 @@ methodOverrideMap = {
     'AddRefDocument' : (0,
                        'void %s(void* docPointer);',
                        '''void %s(void* docPointer) {
-                           SendMsg(%s, (long)docPointer);''',
+                           SendMsg(%s, 0, (long)docPointer);''',
                         0),
 
     'ReleaseDocument' : (0,
                        'void %s(void* docPointer);',
                        '''void %s(void* docPointer) {
-                           SendMsg(%s, (long)docPointer);''',
+                           SendMsg(%s, 0, (long)docPointer);''',
                          0),
     'SetCodePage' : (0,
                      0,
diff --git a/contrib/src/stc/stc.cpp b/contrib/src/stc/stc.cpp
index e44ed9856f..1a8aca13cc 100644
--- a/contrib/src/stc/stc.cpp
+++ b/contrib/src/stc/stc.cpp
@@ -1565,12 +1565,12 @@ void* wxStyledTextCtrl::CreateDocument() {
 
 // Extend life of document.
 void wxStyledTextCtrl::AddRefDocument(void* docPointer) {
-                           SendMsg(2376, (long)docPointer);
+                           SendMsg(2376, 0, (long)docPointer);
 }
 
 // Release a reference to the document, deleting document if it fades to black.
 void wxStyledTextCtrl::ReleaseDocument(void* docPointer) {
-                           SendMsg(2377, (long)docPointer);
+                           SendMsg(2377, 0, (long)docPointer);
 }
 
 // Get which document modification events are sent to the container.
diff --git a/src/stc/gen_iface.py b/src/stc/gen_iface.py
index 95c039f7a6..3da52f8420 100644
--- a/src/stc/gen_iface.py
+++ b/src/stc/gen_iface.py
@@ -488,13 +488,13 @@ methodOverrideMap = {
     'AddRefDocument' : (0,
                        'void %s(void* docPointer);',
                        '''void %s(void* docPointer) {
-                           SendMsg(%s, (long)docPointer);''',
+                           SendMsg(%s, 0, (long)docPointer);''',
                         0),
 
     'ReleaseDocument' : (0,
                        'void %s(void* docPointer);',
                        '''void %s(void* docPointer) {
-                           SendMsg(%s, (long)docPointer);''',
+                           SendMsg(%s, 0, (long)docPointer);''',
                          0),
     'SetCodePage' : (0,
                      0,
diff --git a/src/stc/stc.cpp b/src/stc/stc.cpp
index e44ed9856f..1a8aca13cc 100644
--- a/src/stc/stc.cpp
+++ b/src/stc/stc.cpp
@@ -1565,12 +1565,12 @@ void* wxStyledTextCtrl::CreateDocument() {
 
 // Extend life of document.
 void wxStyledTextCtrl::AddRefDocument(void* docPointer) {
-                           SendMsg(2376, (long)docPointer);
+                           SendMsg(2376, 0, (long)docPointer);
 }
 
 // Release a reference to the document, deleting document if it fades to black.
 void wxStyledTextCtrl::ReleaseDocument(void* docPointer) {
-                           SendMsg(2377, (long)docPointer);
+                           SendMsg(2377, 0, (long)docPointer);
 }
 
 // Get which document modification events are sent to the container.