diff --git a/Alc/ALu.c b/Alc/ALu.c
index d8d41e2b..23b7b057 100644
--- a/Alc/ALu.c
+++ b/Alc/ALu.c
@@ -80,7 +80,7 @@ extern inline ALuint64 clampu64(ALuint64 val, ALuint64 min, ALuint64 max);
 
 extern inline ALfloat lerp(ALfloat val1, ALfloat val2, ALfloat mu);
 extern inline ALfloat resample_fir4(ALfloat val0, ALfloat val1, ALfloat val2, ALfloat val3, ALuint frac);
-extern inline ALfloat resample_fir6(ALfloat val0, ALfloat val1, ALfloat val2, ALfloat val3, ALfloat val4, ALfloat val5, ALuint frac);
+extern inline ALfloat resample_fir8(ALfloat val0, ALfloat val1, ALfloat val2, ALfloat val3, ALfloat val4, ALfloat val5, ALfloat val6, ALfloat val7, ALuint frac);
 
 extern inline void aluVectorSet(aluVector *restrict vector, ALfloat x, ALfloat y, ALfloat z, ALfloat w);