diff --git a/gtk/gtkcssstyle.c b/gtk/gtkcssstyle.c
index f7b626357d..cd5d4d7cfe 100644
--- a/gtk/gtkcssstyle.c
+++ b/gtk/gtkcssstyle.c
@@ -841,7 +841,8 @@ static const int values_size[] = {
   sizeof (GtkCssAnimationValues),
   sizeof (GtkCssTransitionValues),
   sizeof (GtkCssSizeValues),
-  sizeof (GtkCssOtherValues)
+  sizeof (GtkCssOtherValues),
+  sizeof (GtkCssUsedValues)
 };
 
 #define TYPE_INDEX(type) ((type) - ((type) % 2))
diff --git a/gtk/gtkcssstyleprivate.h b/gtk/gtkcssstyleprivate.h
index 32076e1b88..8b2048ef8d 100644
--- a/gtk/gtkcssstyleprivate.h
+++ b/gtk/gtkcssstyleprivate.h
@@ -59,6 +59,7 @@ typedef enum {
   GTK_CSS_SIZE_INITIAL_VALUES,
   GTK_CSS_OTHER_VALUES,
   GTK_CSS_OTHER_INITIAL_VALUES,
+  GTK_CSS_USED_VALUES,
 } GtkCssValuesType;
 
 typedef struct _GtkCssValues GtkCssValues;
@@ -73,6 +74,7 @@ typedef struct _GtkCssAnimationValues GtkCssAnimationValues;
 typedef struct _GtkCssTransitionValues GtkCssTransitionValues;
 typedef struct _GtkCssSizeValues GtkCssSizeValues;
 typedef struct _GtkCssOtherValues GtkCssOtherValues;
+typedef struct _GtkCssUsedValues GtkCssUsedValues;
 
 struct _GtkCssValues {
   int ref_count;
@@ -227,6 +229,28 @@ struct _GtkCssOtherValues {
   GtkCssValue *filter;
 };
 
+struct _GtkCssUsedValues {
+  GtkCssValues base;
+
+  GtkCssValue *color;
+  GtkCssValue *icon_palette;
+  GtkCssValue *background_color;
+  GtkCssValue *box_shadow;
+  GtkCssValue *background_image;
+  GtkCssValue *border_top_color;
+  GtkCssValue *border_right_color;
+  GtkCssValue *border_bottom_color;
+  GtkCssValue *border_left_color;
+  GtkCssValue *border_image_source;
+  GtkCssValue *icon_shadow;
+  GtkCssValue *outline_color;
+  GtkCssValue *caret_color;
+  GtkCssValue *secondary_caret_color;
+  GtkCssValue *text_shadow;
+  GtkCssValue *text_decoration_color;
+  GtkCssValue *icon_source;
+};
+
 /* typedef struct _GtkCssStyle           GtkCssStyle; */
 typedef struct _GtkCssStyleClass      GtkCssStyleClass;
 
@@ -245,6 +269,8 @@ struct _GtkCssStyle
   GtkCssTransitionValues  *transition;
   GtkCssSizeValues        *size;
   GtkCssOtherValues       *other;
+  GtkCssUsedValues        *used;
+
   GtkCssVariableSet       *variables;
 
   GtkCssValue             *variable_values;
diff --git a/gtk/gtkcssvaluesprivate.h b/gtk/gtkcssvaluesprivate.h
index e212ee0b84..d5f7494d87 100644
--- a/gtk/gtkcssvaluesprivate.h
+++ b/gtk/gtkcssvaluesprivate.h
@@ -148,4 +148,65 @@ static const int other_props[] = {
   GTK_CSS_PROPERTY_FILTER,
 };
 
+static const int used_props[] = {
+  GTK_CSS_PROPERTY_COLOR,
+  GTK_CSS_PROPERTY_ICON_PALETTE,
+  GTK_CSS_PROPERTY_BACKGROUND_COLOR,
+  GTK_CSS_PROPERTY_BOX_SHADOW,
+  GTK_CSS_PROPERTY_BACKGROUND_IMAGE,
+  GTK_CSS_PROPERTY_BORDER_TOP_COLOR,
+  GTK_CSS_PROPERTY_BORDER_RIGHT_COLOR,
+  GTK_CSS_PROPERTY_BORDER_BOTTOM_COLOR,
+  GTK_CSS_PROPERTY_BORDER_LEFT_COLOR,
+  GTK_CSS_PROPERTY_BORDER_IMAGE_SOURCE,
+  GTK_CSS_PROPERTY_ICON_SHADOW,
+  GTK_CSS_PROPERTY_OUTLINE_COLOR,
+  GTK_CSS_PROPERTY_CARET_COLOR,
+  GTK_CSS_PROPERTY_SECONDARY_CARET_COLOR,
+  GTK_CSS_PROPERTY_TEXT_SHADOW,
+  GTK_CSS_PROPERTY_TEXT_DECORATION_COLOR,
+  GTK_CSS_PROPERTY_ICON_SOURCE,
+};
+
+/* Maps back from css property ids to position in used_props.
+ * -1 means 'not present'.
+ */
+static const int used_props_map[] = {
+  0, /* color */
+  -1, -1,
+  1, /* icon-palette */
+  2, /* background-color */
+  -1, -1, -1, -1, -1, -1,
+  15, /* text-decoration-color */
+  -1, -1, -1, -1, -1, -1, -1, -1,
+  -1,
+  14, /* text-shadow */
+  3, /* box-shadow */
+  -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1,
+  5, /* border-top-color */
+  6, /* border-right-color */
+  7, /* border-bottom-color */
+  8, /* border-left-color */
+  11, /* outline-color */
+  -1,
+  4, /* background-image */
+  -1,
+  9, /* border-image-source */
+  -1, -1, -1,
+  16, /* icon-source */
+  -1,
+  10, /* icon-shadow */
+  -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1, -1, -1, -1,
+  12, /* caret-color */
+  13, /* secondary-caret-color */
+  -1, -1, -1,
+};
+
+G_STATIC_ASSERT (G_N_ELEMENTS (used_props_map) == GTK_CSS_PROPERTY_N_PROPERTIES);
+
 G_END_DECLS