diff --git a/libavcodec/opus.h b/libavcodec/opus.h
index 2079f423b4..2c3d63a7a2 100644
--- a/libavcodec/opus.h
+++ b/libavcodec/opus.h
@@ -205,6 +205,4 @@ int ff_celt_decode_frame(CeltContext *s, OpusRangeCoder *rc,
                          float **output, int coded_channels, int frame_size,
                          int startband,  int endband);
 
-extern const float ff_celt_window2[120];
-
 #endif /* AVCODEC_OPUS_H */
diff --git a/libavcodec/opusdec.c b/libavcodec/opusdec.c
index 329f784182..556acfe2df 100644
--- a/libavcodec/opusdec.c
+++ b/libavcodec/opusdec.c
@@ -47,6 +47,7 @@
 #include "internal.h"
 #include "mathops.h"
 #include "opus.h"
+#include "opustab.h"
 
 static const uint16_t silk_frame_duration_ms[16] = {
     10, 20, 40, 60,