diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index 5046b0e557..7a0fc47dd8 100644
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -757,7 +757,7 @@ extern float ff_sine_512 [ 512];
 extern float ff_sine_1024[1024];
 extern float ff_sine_2048[2048];
 extern float ff_sine_4096[4096];
-extern float *ff_sine_windows[6];
+extern float * const ff_sine_windows[6];
 
 int ff_mdct_init(MDCTContext *s, int nbits, int inverse, double scale);
 void ff_imdct_calc_c(MDCTContext *s, FFTSample *output, const FFTSample *input);
diff --git a/libavcodec/mdct.c b/libavcodec/mdct.c
index 8a42adb4f3..684e00d9ad 100644
--- a/libavcodec/mdct.c
+++ b/libavcodec/mdct.c
@@ -54,7 +54,7 @@ DECLARE_ALIGNED(16, float, ff_sine_512 [ 512]);
 DECLARE_ALIGNED(16, float, ff_sine_1024[1024]);
 DECLARE_ALIGNED(16, float, ff_sine_2048[2048]);
 DECLARE_ALIGNED(16, float, ff_sine_4096[4096]);
-float *ff_sine_windows[6] = {
+float * const ff_sine_windows[6] = {
     ff_sine_128, ff_sine_256, ff_sine_512, ff_sine_1024, ff_sine_2048, ff_sine_4096
 };