diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c
index edc53f6..7c530c2 100644
--- a/ui/egl-helpers.c
+++ b/ui/egl-helpers.c
@@ -102,12 +102,12 @@
                       GL_COLOR_BUFFER_BIT, GL_LINEAR);
 }
 
-void egl_fb_read(void *dst, egl_fb *src)
+void egl_fb_read(DisplaySurface *dst, egl_fb *src)
 {
     glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
     glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
-    glReadPixels(0, 0, src->width, src->height,
-                 GL_BGRA, GL_UNSIGNED_BYTE, dst);
+    glReadPixels(0, 0, surface_width(dst), surface_height(dst),
+                 GL_BGRA, GL_UNSIGNED_BYTE, surface_data(dst));
 }
 
 void egl_texture_blit(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip)