diff --git a/modules/audio_coding/codecs/isac/fix/source/filterbanks_neon.c b/modules/audio_coding/codecs/isac/fix/source/filterbanks_neon.c
index fd29ccb3ff..a31cea6001 100644
--- a/modules/audio_coding/codecs/isac/fix/source/filterbanks_neon.c
+++ b/modules/audio_coding/codecs/isac/fix/source/filterbanks_neon.c
@@ -15,6 +15,7 @@
 
 #include <arm_neon.h>
 
+#include "modules/audio_coding/codecs/isac/fix/source/filterbank_internal.h"
 #include "rtc_base/checks.h"
 
 void WebRtcIsacfix_AllpassFilter2FixDec16Neon(