diff --git a/src/graphic/Fast3D/gfx_opengl.cpp b/src/graphic/Fast3D/gfx_opengl.cpp
index a29c6508c..f414239d9 100644
--- a/src/graphic/Fast3D/gfx_opengl.cpp
+++ b/src/graphic/Fast3D/gfx_opengl.cpp
@@ -966,7 +966,7 @@ static int gfx_opengl_create_framebuffer() {
     GLuint clrbuf;
     glGenTextures(1, &clrbuf);
     glBindTexture(GL_TEXTURE_2D, clrbuf);
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, 1, 1, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     glBindTexture(GL_TEXTURE_2D, 0);