diff --git a/dev-db/postgresql/postgresql-16.0.ebuild b/dev-db/postgresql/postgresql-16.0.ebuild
index 63bb54fd4eb43..5a39a08cca63c 100644
--- a/dev-db/postgresql/postgresql-16.0.ebuild
+++ b/dev-db/postgresql/postgresql-16.0.ebuild
@@ -4,7 +4,7 @@
 EAPI=8
 
 PYTHON_COMPAT=( python3_{10,11,12} )
-LLVM_MAX_SLOT=16
+LLVM_MAX_SLOT=15
 
 inherit flag-o-matic linux-info llvm pam python-single-r1 systemd tmpfiles
 
@@ -37,8 +37,8 @@ icu? ( dev-libs/icu:= )
 kerberos? ( virtual/krb5 )
 ldap? ( net-nds/openldap:= )
 llvm? (
-	<sys-devel/llvm-17:=
-	<sys-devel/clang-17:=
+	<sys-devel/llvm-16:=
+	<sys-devel/clang-16:=
 )
 lz4? ( app-arch/lz4 )
 pam? ( sys-libs/pam )