diff --git a/pkgs/top-level/php-packages.nix b/pkgs/top-level/php-packages.nix
index e45f9a5bf15e..578dcaf761bf 100644
--- a/pkgs/top-level/php-packages.nix
+++ b/pkgs/top-level/php-packages.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, pkgs, fetchgit, php, autoconf, pkgconfig, re2c
-, gettext, bzip2, curl, libxml2, openssl, gmp, icu, oniguruma, libsodium
+, gettext, bzip2, curl, libxml2, openssl, gmp, icu64, oniguruma, libsodium
 , html-tidy, libzip, zlib, pcre, pcre2, libxslt, aspell, openldap, cyrus_sasl
 , uwimap, pam, libiconv, enchant1, libXpm, gd, libwebp, libjpeg, libpng
 , freetype, libffi, freetds, postgresql, sqlite, net-snmp, unixODBC, libedit
@@ -547,7 +547,7 @@ in
       nativeBuildInputs = [ pkgs.pkgconfig ];
       buildInputs = with pkgs; [
         cyrus_sasl
-        icu
+        icu64
         openssl
         snappy
         zlib
@@ -972,7 +972,7 @@ in
         enable = (!stdenv.isDarwin); }
       # interbase (7.3, 7.2)
       { name = "intl";
-        buildInputs = [ icu ];
+        buildInputs = [ icu64 ];
         patches = lib.optional (lib.versionOlder php.version "7.4") (fetchpatch {
           url = "https://github.com/php/php-src/commit/93a9b56c90c334896e977721bfb3f38b1721cec6.patch";
           sha256 = "055l40lpyhb0rbjn6y23qkzdhvpp7inbnn6x13cpn4inmhjqfpg4";