diff --git a/js.spec b/js.spec
index 00eff55..46706cc 100644
--- a/js.spec
+++ b/js.spec
@@ -1,29 +1,30 @@
 %define real_version 1.7.0
 
-Summary: JavaScript interpreter and libraries
-Name: js
-Version: 1.70
-Release: 7%{?dist}
+Summary:	JavaScript interpreter and libraries
+Name:	js
+Version:	1.70
+Release:	8%{?dist}
 # The sources are triple licensed, but when we link against readline which is
 # GPL, the result can only be GPL.
 %if 0%{?_without_readline:1}
-License: GPLv2+ or LGPLv2+ or MPLv1.1
+License:	GPLv2+ or LGPLv2+ or MPLv1.1
 %else
-License: GPLv2+
+License:	GPLv2+
 %endif
-Group: Development/Languages
-URL: http://www.mozilla.org/js/
-Source: http://ftp.mozilla.org/pub/mozilla.org/js/js-%{real_version}.tar.gz
-Patch0: js-1.7.0-make.patch
-Patch1: js-shlib.patch
-Patch2: js-1.5-va_copy.patch
-Patch3: js-ldflags.patch
-Patch4: js-1.7.0-threadsafe.patch
-Patch5: js-1.60-ncurses.patch
-BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root
-Buildrequires: nspr-devel
-Buildrequires: readline-devel, ncurses-devel
-Provides: libjs = %{version}-%{release}
+Group:	Development/Languages
+URL:		http://www.mozilla.org/js/
+Source:	http://ftp.mozilla.org/pub/mozilla.org/js/js-%{real_version}.tar.gz
+Patch0:	js-1.7.0-make.patch
+Patch1:	js-shlib.patch
+Patch2:	js-1.5-va_copy.patch
+Patch3:	js-ldflags.patch
+Patch4:	js-1.7.0-threadsafe.patch
+Patch5:	js-1.60-ncurses.patch
+Provides:	libjs = %{version}-%{release}
+BuildRoot:	%{_tmppath}/%{name}-%{version}-%{release}-root
+Buildrequires:	nspr-devel
+Buildrequires:	readline-devel, ncurses-devel
+
 
 %description
 JavaScript is the Netscape-developed object scripting language used in millions
@@ -63,42 +64,42 @@ includedir=%{_includedir}
 
 Name: libjs
 Description: JS library
-Requires:
+Requires: nspr
 Version: %{real_version}
 Libs: -L${libdir} -ljs
-Cflags: -I${includedir}
+Cflags: -DXP_UNIX=1 -DJS_THREADSAFE=1 -I${includedir}
 EOF
 
 
 %build
 export BUILD_OPT=1
 %{__make} %{?_smp_mflags} -C src -f Makefile.ref \
-    JS_THREADSAFE="1" \
-    XCFLAGS="%{optflags} -fPIC" \
-    BUILD_OPT="1" \
+	JS_THREADSAFE="1" \
+	XCFLAGS="%{optflags} -fPIC" \
+	BUILD_OPT="1" \
 %if 0%{!?_without_readline:1}
-    JS_READLINE="1"
+	JS_READLINE="1"
 %endif
 
 
 %install
 %{__rm} -rf %{buildroot}
 %{__mkdir_p} %{buildroot}%{_bindir} \
-             %{buildroot}%{_libdir}/pkgconfig \
-             %{buildroot}%{_includedir}
+	%{buildroot}%{_libdir}/pkgconfig \
+	%{buildroot}%{_includedir}
 %{__install} -m 0755 src/Linux_All_OPT.OBJ/{js,jscpucfg} \
-    %{buildroot}%{_bindir}/
+	%{buildroot}%{_bindir}/
 %{__install} -m 0644 src/Linux_All_OPT.OBJ/libjs.a \
-    %{buildroot}%{_libdir}/
+	%{buildroot}%{_libdir}/
 %{__install} -m 0755 src/Linux_All_OPT.OBJ/libjs.so \
-    %{buildroot}%{_libdir}/
+	%{buildroot}%{_libdir}/
 %{__mv} %{buildroot}%{_libdir}/libjs.so %{buildroot}%{_libdir}/libjs.so.1
 %{__ln_s} -nf libjs.so.1 %{buildroot}%{_libdir}/libjs.so
 %{__install} -m 0644 src/js*.h src/js.msg src/*.tbl \
-    src/Linux_All_OPT.OBJ/jsautocfg.h \
-    %{buildroot}%{_includedir}/
+	src/Linux_All_OPT.OBJ/jsautocfg.h \
+	%{buildroot}%{_includedir}/
 %{__install} -m 0644 libjs.pc \
-    %{buildroot}%{_libdir}/pkgconfig/
+	%{buildroot}%{_libdir}/pkgconfig/
 
 
 %clean
@@ -128,6 +129,10 @@ export BUILD_OPT=1
 
 
 %changelog
+* Sun Aug 2 2009 Pavel Alexeev <Pahan@Hubbitus.info> - 1.70-8
+- Reformat spec with tabs.
+- By report of Thomas Sondergaard (BZ#511162) Add -DXP_UNIX=1 -DJS_THREADSAFE=1 flags and nspr requires into libjs.pc
+
 * Fri Jul 24 2009 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.70-7
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_12_Mass_Rebuild