diff --git a/libultraship/libultraship/Lib/Fast3D/gfx_opengl.cpp b/libultraship/libultraship/Lib/Fast3D/gfx_opengl.cpp
index 5373f8799..f314c30d2 100644
--- a/libultraship/libultraship/Lib/Fast3D/gfx_opengl.cpp
+++ b/libultraship/libultraship/Lib/Fast3D/gfx_opengl.cpp
@@ -650,6 +650,7 @@ static int gfx_opengl_create_framebuffer() {
 }
 
 static void gfx_opengl_update_framebuffer_parameters(int fb_id, uint32_t width, uint32_t height, uint32_t msaa_level, bool opengl_invert_y, bool render_target, bool has_depth_buffer, bool can_extract_depth) {
+    framebuffers.resize(framebuffers.size() + 1);
     Framebuffer& fb = framebuffers[fb_id];
 
     width = max(width, 1U);