diff --git a/video/out/opengl/common.c b/video/out/opengl/common.c
index ed3acede1c..16a5018dfd 100644
--- a/video/out/opengl/common.c
+++ b/video/out/opengl/common.c
@@ -269,6 +269,14 @@ static const struct gl_functions gl_functions[] = {
             {0}
         },
     },
+    {
+        .ver_core = 430,
+        .ver_es_core = 300,
+        .functions = (const struct gl_function[]) {
+            DEF_FN(InvalidateFramebuffer),
+            {0}
+        },
+    },
     // Swap control, always an OS specific extension
     // The OSX code loads this manually.
     {
diff --git a/video/out/opengl/common.h b/video/out/opengl/common.h
index 4f21e25455..4ee61975f4 100644
--- a/video/out/opengl/common.h
+++ b/video/out/opengl/common.h
@@ -181,6 +181,8 @@ struct GL {
     void (GLAPIENTRY *UniformMatrix3fv)(GLint, GLsizei, GLboolean,
                                         const GLfloat *);
 
+    void (GLAPIENTRY *InvalidateFramebuffer)(GLenum, GLsizei, const GLenum *);
+
     GLsync (GLAPIENTRY *FenceSync)(GLenum, GLbitfield);
     GLenum (GLAPIENTRY *ClientWaitSync)(GLsync, GLbitfield, GLuint64);
     void (GLAPIENTRY *DeleteSync)(GLsync sync);
diff --git a/video/out/opengl/utils.c b/video/out/opengl/utils.c
index 199895e4ec..f8ed6eebaf 100644
--- a/video/out/opengl/utils.c
+++ b/video/out/opengl/utils.c
@@ -293,6 +293,7 @@ bool fbotex_change(struct fbotex *fbo, GL *gl, struct mp_log *log, int w, int h,
     if (fbo->rw == cw && fbo->rh == ch && fbo->iformat == iformat) {
         fbo->lw = w;
         fbo->lh = h;
+        fbotex_invalidate(fbo);
         return true;
     }
 
@@ -378,6 +379,20 @@ void fbotex_uninit(struct fbotex *fbo)
     }
 }
 
+// Mark framebuffer contents as unneeded.
+void fbotex_invalidate(struct fbotex *fbo)
+{
+    GL *gl = fbo->gl;
+
+    if (!fbo->fbo || !gl->InvalidateFramebuffer)
+        return;
+
+    gl->BindFramebuffer(GL_FRAMEBUFFER, fbo->fbo);
+    gl->InvalidateFramebuffer(GL_FRAMEBUFFER, 1,
+                              (GLenum[]){GL_COLOR_ATTACHMENT0});
+    gl->BindFramebuffer(GL_FRAMEBUFFER, 0);
+}
+
 // Standard parallel 2D projection, except y1 < y0 means that the coordinate
 // system is flipped, not the projection.
 void gl_transform_ortho(struct gl_transform *t, float x0, float x1,
diff --git a/video/out/opengl/utils.h b/video/out/opengl/utils.h
index c7a72969f6..569ec0f23c 100644
--- a/video/out/opengl/utils.h
+++ b/video/out/opengl/utils.h
@@ -84,6 +84,7 @@ bool fbotex_change(struct fbotex *fbo, GL *gl, struct mp_log *log, int w, int h,
 #define FBOTEX_FUZZY_H 2
 #define FBOTEX_FUZZY (FBOTEX_FUZZY_W | FBOTEX_FUZZY_H)
 void fbotex_set_filter(struct fbotex *fbo, GLenum gl_filter);
+void fbotex_invalidate(struct fbotex *fbo);
 
 // A 3x2 matrix, with the translation part separate.
 struct gl_transform {