diff --git a/include/wx/android/setup.h b/include/wx/android/setup.h
index 9e8c35e644..2291c62a52 100644
--- a/include/wx/android/setup.h
+++ b/include/wx/android/setup.h
@@ -1431,9 +1431,9 @@
 // Should wxDC provide SetTransformMatrix() and related methods?
 //
 // Default is 1 but can be set to 0 if this functionality is not used. Notice
-// that currently only wxMSW supports this so setting this to 0 doesn't change
-// much for non-MSW platforms (although it will still save a few bytes
-// probably).
+// that currently wxMSW, wxGTK3 support this for wxDC and all platforms support
+// this for wxGCDC so setting this to 0 doesn't change much if neither of these
+// is used (although it will still save a few bytes probably).
 //
 // Recommended setting: 1.
 #define wxUSE_DC_TRANSFORM_MATRIX 1
diff --git a/include/wx/gtk/setup0.h b/include/wx/gtk/setup0.h
index d66b698478..27ef6957b5 100644
--- a/include/wx/gtk/setup0.h
+++ b/include/wx/gtk/setup0.h
@@ -1432,9 +1432,9 @@
 // Should wxDC provide SetTransformMatrix() and related methods?
 //
 // Default is 1 but can be set to 0 if this functionality is not used. Notice
-// that currently only wxMSW supports this so setting this to 0 doesn't change
-// much for non-MSW platforms (although it will still save a few bytes
-// probably).
+// that currently wxMSW, wxGTK3 support this for wxDC and all platforms support
+// this for wxGCDC so setting this to 0 doesn't change much if neither of these
+// is used (although it will still save a few bytes probably).
 //
 // Recommended setting: 1.
 #define wxUSE_DC_TRANSFORM_MATRIX 1
diff --git a/include/wx/motif/setup0.h b/include/wx/motif/setup0.h
index cf922bc5a8..cc609cf02e 100644
--- a/include/wx/motif/setup0.h
+++ b/include/wx/motif/setup0.h
@@ -1432,9 +1432,9 @@
 // Should wxDC provide SetTransformMatrix() and related methods?
 //
 // Default is 1 but can be set to 0 if this functionality is not used. Notice
-// that currently only wxMSW supports this so setting this to 0 doesn't change
-// much for non-MSW platforms (although it will still save a few bytes
-// probably).
+// that currently wxMSW, wxGTK3 support this for wxDC and all platforms support
+// this for wxGCDC so setting this to 0 doesn't change much if neither of these
+// is used (although it will still save a few bytes probably).
 //
 // Recommended setting: 1.
 #define wxUSE_DC_TRANSFORM_MATRIX 1
diff --git a/include/wx/osx/setup0.h b/include/wx/osx/setup0.h
index 4ba8eb2bf2..a7112dfa97 100644
--- a/include/wx/osx/setup0.h
+++ b/include/wx/osx/setup0.h
@@ -1433,9 +1433,9 @@
 // Should wxDC provide SetTransformMatrix() and related methods?
 //
 // Default is 1 but can be set to 0 if this functionality is not used. Notice
-// that currently only wxMSW supports this so setting this to 0 doesn't change
-// much for non-MSW platforms (although it will still save a few bytes
-// probably).
+// that currently wxMSW, wxGTK3 support this for wxDC and all platforms support
+// this for wxGCDC so setting this to 0 doesn't change much if neither of these
+// is used (although it will still save a few bytes probably).
 //
 // Recommended setting: 1.
 #define wxUSE_DC_TRANSFORM_MATRIX 1
diff --git a/include/wx/setup_inc.h b/include/wx/setup_inc.h
index ca8f94bd50..09063c0c7a 100644
--- a/include/wx/setup_inc.h
+++ b/include/wx/setup_inc.h
@@ -1428,9 +1428,9 @@
 // Should wxDC provide SetTransformMatrix() and related methods?
 //
 // Default is 1 but can be set to 0 if this functionality is not used. Notice
-// that currently only wxMSW supports this so setting this to 0 doesn't change
-// much for non-MSW platforms (although it will still save a few bytes
-// probably).
+// that currently wxMSW, wxGTK3 support this for wxDC and all platforms support
+// this for wxGCDC so setting this to 0 doesn't change much if neither of these
+// is used (although it will still save a few bytes probably).
 //
 // Recommended setting: 1.
 #define wxUSE_DC_TRANSFORM_MATRIX 1
diff --git a/include/wx/univ/setup0.h b/include/wx/univ/setup0.h
index 42f75c700d..a235d4927b 100644
--- a/include/wx/univ/setup0.h
+++ b/include/wx/univ/setup0.h
@@ -1431,9 +1431,9 @@
 // Should wxDC provide SetTransformMatrix() and related methods?
 //
 // Default is 1 but can be set to 0 if this functionality is not used. Notice
-// that currently only wxMSW supports this so setting this to 0 doesn't change
-// much for non-MSW platforms (although it will still save a few bytes
-// probably).
+// that currently wxMSW, wxGTK3 support this for wxDC and all platforms support
+// this for wxGCDC so setting this to 0 doesn't change much if neither of these
+// is used (although it will still save a few bytes probably).
 //
 // Recommended setting: 1.
 #define wxUSE_DC_TRANSFORM_MATRIX 1