diff --git a/src/compositor.c b/src/compositor.c
index faa06191..037c2c07 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -1722,7 +1722,7 @@ notify_axis(struct wl_seat *seat, uint32_t time, uint32_t axis,
 
 	if (value)
 		weston_compositor_run_axis_binding(compositor, ws, time, axis,
-						   wl_fixed_to_int(value));
+						   value);
 	else
 		return;
 
diff --git a/src/compositor.h b/src/compositor.h
index b0cca43b..45ebeddf 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -549,7 +549,7 @@ weston_compositor_add_button_binding(struct weston_compositor *compositor,
 
 typedef void (*weston_axis_binding_handler_t)(struct wl_seat *seat,
 					      uint32_t time, uint32_t axis,
-					      int32_t value, void *data);
+					      wl_fixed_t value, void *data);
 struct weston_binding *
 weston_compositor_add_axis_binding(struct weston_compositor *compositor,
 			           uint32_t axis,
diff --git a/src/shell.c b/src/shell.c
index fc7f48f6..40e84b6f 100644
--- a/src/shell.c
+++ b/src/shell.c
@@ -1617,7 +1617,7 @@ resize_binding(struct wl_seat *seat, uint32_t time, uint32_t button, void *data)
 
 static void
 surface_opacity_binding(struct wl_seat *seat, uint32_t time, uint32_t axis,
-			int32_t value, void *data)
+			wl_fixed_t value, void *data)
 {
 	float step = 0.05;
 	struct shell_surface *shsurf;
@@ -1639,7 +1639,7 @@ surface_opacity_binding(struct wl_seat *seat, uint32_t time, uint32_t axis,
 			break;
 	}
 
-	surface->alpha += value * step;
+	surface->alpha += wl_fixed_to_double(value) * step;
 
 	if (surface->alpha > 1.0)
 		surface->alpha = 1.0;
@@ -1652,7 +1652,7 @@ surface_opacity_binding(struct wl_seat *seat, uint32_t time, uint32_t axis,
 
 static void
 do_zoom(struct wl_seat *seat, uint32_t time, uint32_t key, uint32_t axis,
-	int32_t value)
+	wl_fixed_t value)
 {
 	struct weston_seat *ws = (struct weston_seat *) seat;
 	struct weston_compositor *compositor = ws->compositor;
@@ -1669,7 +1669,8 @@ do_zoom(struct wl_seat *seat, uint32_t time, uint32_t key, uint32_t axis,
 			else if (key == KEY_PAGEDOWN)
 				increment = -output->zoom.increment;
 			else if (axis == WL_POINTER_AXIS_VERTICAL_SCROLL)
-				increment = output->zoom.increment * value;
+				increment = output->zoom.increment *
+					    wl_fixed_to_double(value);
 			else
 				increment = 0;
 
@@ -1696,7 +1697,7 @@ do_zoom(struct wl_seat *seat, uint32_t time, uint32_t key, uint32_t axis,
 
 static void
 zoom_axis_binding(struct wl_seat *seat, uint32_t time, uint32_t axis,
-		  int32_t value, void *data)
+		  wl_fixed_t value, void *data)
 {
 	do_zoom(seat, time, 0, axis, value);
 }
diff --git a/src/util.c b/src/util.c
index bde49874..3d28f8f6 100644
--- a/src/util.c
+++ b/src/util.c
@@ -405,7 +405,7 @@ WL_EXPORT void
 weston_compositor_run_axis_binding(struct weston_compositor *compositor,
 				   struct weston_seat *seat,
 				   uint32_t time, uint32_t axis,
-				   int32_t value)
+				   wl_fixed_t value)
 {
 	struct weston_binding *b;