diff --git a/pkgs/top-level/php-packages.nix b/pkgs/top-level/php-packages.nix
index 568b84be13e0..329c35e226c1 100644
--- a/pkgs/top-level/php-packages.nix
+++ b/pkgs/top-level/php-packages.nix
@@ -13,8 +13,8 @@ let
 
   apcu40 = assert !isPhp7; buildPecl {
     name = "apcu-4.0.7";
-
     sha256 = "1mhbz56mbnq7dryf2d64l84lj3fpr5ilmg2424glans3wcg772hp";
+    buildInputs = [ pkgs.pcre ];
   };
 
   apcu51 = assert isPhp7; buildPecl {