diff --git a/pkgs/development/libraries/fftw/default.nix b/pkgs/development/libraries/fftw/default.nix
index f0632e1460a..9385903b3f5 100644
--- a/pkgs/development/libraries/fftw/default.nix
+++ b/pkgs/development/libraries/fftw/default.nix
@@ -6,7 +6,7 @@ assert stdenv.cc.isClang -> llvmPackages != null;
 assert elem precision [ "single" "double" "long-double" "quad-precision" ];
 
 let
-  version = "3.3.8";
+  version = "3.3.9";
   withDoc = stdenv.cc.isGNU;
 in
 
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
       "http://fftw.org/fftw-${version}.tar.gz"
       "ftp://ftp.fftw.org/pub/fftw/fftw-${version}.tar.gz"
     ];
-    sha256 = "00z3k8fq561wq2khssqg0kallk0504dzlx989x3vvicjdqpjc4v1";
+    sha256 = "sha256-vyx85AsEroEa9xTetRJRDMLBe5q51t3PSf5Eh+6nrz0=";
   };
 
   outputs = [ "out" "dev" "man" ]