diff --git a/PKGBUILD b/PKGBUILD
index 243efc5..ad54790 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -39,6 +39,8 @@ validpgpkeys=('747774305F9DCC9504703CEFB73CBC7708FA8C10')	# Markus Gothe <nietzs
 prepare() {
   cd "$srcdir/$pkgname-$pkgver"
   patch -Np1 -i "$srcdir/psacct-6.6.4-sprintf-buffer-overflow.patch"
+  sed -i '/compare_user_entry/s/(int (\*)())/(int (*)(const void *, const void *))/' ./sa.c
+  sed -i '/compare_sum_entry/s/(int (\*)())/(int (*)(const void *, const void *))/' ./sa.c
 }
 
 build() {