diff --git a/hedgewars.spec b/hedgewars.spec
index 2774c21..dcb989b 100644
--- a/hedgewars.spec
+++ b/hedgewars.spec
@@ -49,6 +49,7 @@ BuildRequires:  ghc-haskell2010-devel
 BuildRequires:  ghc-deepseq-devel
 BuildRequires:  ghc-vector-devel
 BuildRequires:  ghc-SHA-devel
+BuildRequires:  ghc-entropy-devel
 BuildRequires:  compat-lua-devel
 
 %description -n hedgewars-server