--- a/gfx/cairo/cairo/src/cairo-ft-font.c
+++ b/gfx/cairo/cairo/src/cairo-ft-font.c
@@ -736,17 +736,17 @@ static cairo_status_t
 	double min_distance = DBL_MAX;
 	cairo_bool_t magnify = TRUE;
 	int i;
 	int best_i = 0;
 	double best_x_size = 0;
 	double best_y_size = 0;
 
 	for (i = 0; i < unscaled->face->num_fixed_sizes; i++) {
-	    double x_size = unscaled->face->available_sizes[i].y_ppem / 64.;
+	    double x_size = unscaled->face->available_sizes[i].x_ppem / 64.;
 	    double y_size = unscaled->face->available_sizes[i].y_ppem / 64.;
 	    double distance = y_size - y_scale;
 
 	    /*
 	     * distance is positive if current strike is larger than desired
 	     * size, and negative if smaller.
 	     *
 	     * We like to prefer down-scaling to upscaling.