diff --git a/pkgs/by-name/dm/dmitry/implicit-function-declaration.patch b/pkgs/by-name/dm/dmitry/implicit-function-declaration.patch
new file mode 100644
index 000000000000..608f90ccbc4d
--- /dev/null
+++ b/pkgs/by-name/dm/dmitry/implicit-function-declaration.patch
@@ -0,0 +1,28 @@
+---
+ src/dmitry.c | 1 +
+ src/file.c   | 2 ++
+ 2 files changed, 3 insertions(+)
+
+diff --git a/src/dmitry.c b/src/dmitry.c
+index d47f231..567482d 100644
+--- a/src/dmitry.c
++++ b/src/dmitry.c
+@@ -9,6 +9,7 @@
+ #include <ctype.h>
+ #include <string.h>
+ #include <signal.h>
++#include <stdlib.h>
+ #include <sys/types.h>
+ #include <sys/socket.h>
+ #include <netinet/in.h>
+diff --git a/src/file.c b/src/file.c
+index f4ad48b..3714786 100644
+--- a/src/file.c
++++ b/src/file.c
+@@ -1,4 +1,6 @@
+ #include "includes/file.h"
++#include <string.h>
++#include <stdlib.h>
+ int file_prep()
+ {
+ 	outputfile[strlen(outputfile)] = '\0';
diff --git a/pkgs/by-name/dm/dmitry/package.nix b/pkgs/by-name/dm/dmitry/package.nix
index 5a641d1bf03e..fcde9593ba4b 100644
--- a/pkgs/by-name/dm/dmitry/package.nix
+++ b/pkgs/by-name/dm/dmitry/package.nix
@@ -16,16 +16,18 @@ stdenv.mkDerivation {
     hash = "sha256-cYFeBM8xFMaLXYk6Rg+5JvfbbIJI9F3mefzCX3+XbB0=";
   };
 
+  patches = [ ./implicit-function-declaration.patch ];
+
   nativeBuildInputs = [ autoreconfHook ];
 
   env.NIX_CFLAGS_COMPILE = toString [ "-fcommon" ];
 
-  meta = with lib; {
+  meta = {
     description = "Deepmagic Information Gathering Tool";
     mainProgram = "dmitry";
     homepage = "https://github.com/jaygreig86/dmitry";
-    maintainers = with maintainers; [ d3vil0p3r ];
-    platforms = platforms.linux;
-    license = licenses.gpl2Plus;
+    maintainers = with lib.maintainers; [ d3vil0p3r ];
+    platforms = lib.platforms.linux;
+    license = lib.licenses.gpl2Plus;
   };
 }