diff --git a/Copyright b/Copyright
index 51a1a16f90..0ab48a06d8 100644
--- a/Copyright
+++ b/Copyright
@@ -12,6 +12,9 @@ the code to LGPLv2.1+ at a later point without asking the contributor. (This
 is a safeguard for making potential relicensing of the project to LGPLv2.1+
 easier.) Using a more liberal license compatible to LGPLv2.1+ is also ok.
 
+Some GPLv3 or LGPLv3 code in mpv can be enabled by building with --enable-gpl3,
+and in this case, the resulting binaries must be distributed under GPLv3.
+
 For information about authors and contributors, consult the git log, which
 contains the complete SVN and CVS history as well.
 
diff --git a/TOOLS/old-configure b/TOOLS/old-configure
index 5f7a75b77d..a4776eddae 100755
--- a/TOOLS/old-configure
+++ b/TOOLS/old-configure
@@ -976,6 +976,7 @@ cat > $TMPC << EOF
 #define HAVE_SSE4_INTRINSICS 1
 #define HAVE_C11_TLS 1
 #define HAVE_EGL_ANGLE 0
+#define HAVE_GPL3 1
 
 #ifdef __OpenBSD__
 #define DEFAULT_CDROM_DEVICE "/dev/rcd0c"
diff --git a/video/out/opengl/nnedi3.c b/video/out/opengl/nnedi3.c
index 681aad5813..bb200b0f7a 100644
--- a/video/out/opengl/nnedi3.c
+++ b/video/out/opengl/nnedi3.c
@@ -18,10 +18,15 @@
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
+ *
+ * The shader portions may have been derived from existing LGPLv3 shaders
+ * (see below), possibly making this file effectively LGPLv3.
  */
 
 #include "nnedi3.h"
 
+#if HAVE_NNEDI
+
 #include <assert.h>
 #include <stdint.h>
 #include <float.h>
@@ -233,3 +238,21 @@ void pass_nnedi3(GL *gl, struct gl_shader_cache *sc, int planes, int tex_num,
               i, tex_num, tex_num, tex_num, i, tex_mul);
     }
 }
+
+#else
+
+const struct m_sub_options nnedi3_conf = {0};
+
+
+const float* get_nnedi3_weights(const struct nnedi3_opts *conf, int *size)
+{
+    return NULL;
+}
+
+void pass_nnedi3(GL *gl, struct gl_shader_cache *sc, int planes, int tex_num,
+                 int step, float tex_mul, const struct nnedi3_opts *conf,
+                 struct gl_transform *transform)
+{
+}
+
+#endif
diff --git a/video/out/opengl/nnedi3.h b/video/out/opengl/nnedi3.h
index be69f34c78..837383c6f6 100644
--- a/video/out/opengl/nnedi3.h
+++ b/video/out/opengl/nnedi3.h
@@ -23,9 +23,12 @@
 #ifndef MP_GL_NNEDI3_H
 #define MP_GL_NNEDI3_H
 
+#include "config.h"
 #include "common.h"
 #include "utils.h"
 
+#define HAVE_NNEDI HAVE_GPL3
+
 #define NNEDI3_UPLOAD_UBO 0
 #define NNEDI3_UPLOAD_SHADER 1
 
diff --git a/video/out/opengl/video.c b/video/out/opengl/video.c
index f07fbb104b..6f3aba249c 100644
--- a/video/out/opengl/video.c
+++ b/video/out/opengl/video.c
@@ -459,8 +459,11 @@ const struct m_sub_options gl_video_conf = {
         OPT_FLOAT("sharpen", unsharp, 0),
         OPT_CHOICE("prescale", prescale, 0,
                    ({"none", 0},
-                    {"superxbr", 1},
-                    {"nnedi3", 2})),
+                    {"superxbr", 1}
+#if HAVE_NNEDI
+                    , {"nnedi3", 2}
+#endif
+                    )),
         OPT_INTRANGE("prescale-passes",
                      prescale_passes, 0, 1, MAX_PRESCALE_PASSES),
         OPT_FLOATRANGE("prescale-downscaling-threshold",
diff --git a/wscript b/wscript
index 0f113002ba..1873881b1a 100644
--- a/wscript
+++ b/wscript
@@ -10,6 +10,11 @@ from waftools.checks.custom import *
 
 build_options = [
     {
+        'name': '--gpl3',
+        'desc': 'GPL3 license',
+        'default': 'disable',
+        'func': check_true
+    }, {
         'name': '--cplayer',
         'desc': 'mpv CLI player',
         'default': 'enable',