diff --git a/include/linux/coda_psdev.h b/include/linux/coda_psdev.h
index 284b520..1e60c5a4 100644
--- a/include/linux/coda_psdev.h
+++ b/include/linux/coda_psdev.h
@@ -63,7 +63,7 @@
 int venus_access(struct super_block *sb, struct CodaFid *fid, int mask);
 int venus_pioctl(struct super_block *sb, struct CodaFid *fid,
 		 unsigned int cmd, struct PioctlData *data);
-int coda_downcall(int opcode, union outputArgs *out, struct super_block *sb);
+int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out);
 int venus_fsync(struct super_block *sb, struct CodaFid *fid);
 int venus_statfs(struct dentry *dentry, struct kstatfs *sfs);