diff --git a/apps/eq.h b/apps/eq.h
index f7616387b4..c4eb5f16c0 100644
--- a/apps/eq.h
+++ b/apps/eq.h
@@ -35,7 +35,7 @@ void eq_pk_coefs(unsigned long cutoff, unsigned long Q, long db, long *c);
 void eq_ls_coefs(unsigned long cutoff, unsigned long Q, long db, long *c);
 void eq_hs_coefs(unsigned long cutoff, unsigned long Q, long db, long *c);
 void eq_filter(long **x, struct eqfilter *f, unsigned num,
-               unsigned samples, unsigned shift);
+               unsigned channels, unsigned shift);
 
 #endif