diff --git a/pkgs/applications/science/biology/diamond/default.nix b/pkgs/applications/science/biology/diamond/default.nix
index c0e59fbaf066..d287ab8a4848 100644
--- a/pkgs/applications/science/biology/diamond/default.nix
+++ b/pkgs/applications/science/biology/diamond/default.nix
@@ -11,9 +11,6 @@ stdenv.mkDerivation rec {
     sha256 = "17z9vwj58i1zc22gv4qscx0dk3nxf5ix443gxsibh3a5zsnc6dkg";
   };
 
-  patches = [
-    ./diamond-0.8.36-no-warning.patch
-  ];
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ zlib ];
diff --git a/pkgs/applications/science/biology/diamond/diamond-0.8.36-no-warning.patch b/pkgs/applications/science/biology/diamond/diamond-0.8.36-no-warning.patch
deleted file mode 100644
index a16d475c5564..000000000000
--- a/pkgs/applications/science/biology/diamond/diamond-0.8.36-no-warning.patch
+++ /dev/null
@@ -1,20 +0,0 @@
-diff -u -r diamond-0.8.36/src/dp/scalar_traceback.h diamond-0.8.36-patched/src/dp/scalar_traceback.h
---- diamond-0.8.36/src/dp/scalar_traceback.h	2017-02-06 16:32:05.000000000 +0100
-+++ diamond-0.8.36-patched/src/dp/scalar_traceback.h	2017-02-23 15:13:24.000000000 +0100
-@@ -19,6 +19,7 @@
- #ifndef SCALAR_TRACEBACK_H_
- #define SCALAR_TRACEBACK_H_
- 
-+#include <cmath>
- #include <exception>
- #include "../basic/score_matrix.h"
- 
-@@ -31,7 +32,7 @@
- template<>
- inline bool almost_equal<float>(float x, float y)
- {
--	return abs(x - y) < 0.001f;
-+	return std::abs(x - y) < 0.001f;
- }
- 
- template<typename _score>