diff --git a/development/nsis/nsis-fix-compile.patch b/development/nsis/nsis-fix-compile.patch
new file mode 100644
index 0000000000..62e9e43c5d
--- /dev/null
+++ b/development/nsis/nsis-fix-compile.patch
@@ -0,0 +1,10 @@
+--- nsis-2.46-src/Source/script.cpp.orig	2012-09-19 07:37:04.579646966 +0700
++++ nsis-2.46-src/Source/script.cpp	2012-09-19 07:37:34.676226671 +0700
+@@ -16,6 +16,7 @@
+ 
+ #include "Platform.h"
+ #include <stdio.h>
++#include <unistd.h>
+ #include <ctype.h>
+ #include "tokens.h"
+ #include "build.h"
diff --git a/development/nsis/nsis.SlackBuild b/development/nsis/nsis.SlackBuild
index 5b5a9d6e66..12ea856ec6 100644
--- a/development/nsis/nsis.SlackBuild
+++ b/development/nsis/nsis.SlackBuild
@@ -24,7 +24,7 @@
 
 PRGNAM=nsis
 VERSION=2.46
-BUILD=${BUILD:-2}
+BUILD=${BUILD:-3}
 TAG=${TAG:-_SBo}
 
 # Automatically determine the architecture we're building on:
@@ -72,6 +72,8 @@ unzip $CWD/$PRGNAM-$VERSION.zip -d $PKG/usr/lib${LIBDIRSUFFIX}
 chown -R root:root $PKG/usr/lib${LIBDIRSUFFIX}/$PRGNAM-$VERSION
 chmod -R u+w,go+r-w,a-s $PKG/usr/lib${LIBDIRSUFFIX}/$PRGNAM-$VERSION
 
+patch -p1 < $CWD/nsis-fix-compile.patch
+
 # PREFIX=$PKG/usr/lib${LIBDIRSUFFIX}/$PRGNAM-$VERSION search located zip extracted dir.
 # *makensis* will be placed in $PKG/usr/lib${LIBDIRSUFFIX}/$PRGNAM-$VERSION
 scons \