diff --git a/fltk-1.3-L3156.patch b/fltk-1.3-L3156.patch
new file mode 100644
index 0000000..b61def2
--- /dev/null
+++ b/fltk-1.3-L3156.patch
@@ -0,0 +1,42 @@
+Index: src/fl_font.cxx
+===================================================================
+--- src/fl_font.cxx	(revision 10503)
++++ src/fl_font.cxx	(revision 10504)
+@@ -55,6 +55,12 @@
+ #  include "fl_font_x.cxx"
+ #endif // WIN32
+ 
++#if ! (defined(WIN32) || defined(__APPLE__))
++XFontStruct *fl_X_core_font()
++{
++  return fl_xfont.value();
++}
++#endif
+ 
+ double fl_width(const char* c) {
+   if (c) return fl_width(c, (int) strlen(c));
+Index: src/gl_draw.cxx
+===================================================================
+--- src/gl_draw.cxx	(revision 10503)
++++ src/gl_draw.cxx	(revision 10504)
+@@ -81,7 +81,7 @@
+  * then sorting through them at draw time (for normal X rendering) to find which one can
+  * render the current glyph... But for now, just use the first font in the list for GL...
+  */
+-    XFontStruct *font = fl_xfont;
++    XFontStruct *font = fl_X_core_font();
+     int base = font->min_char_or_byte2;
+     int count = font->max_char_or_byte2-base+1;
+     fl_fontsize->listbase = glGenLists(256);
+Index: FL/x.H
+===================================================================
+--- FL/x.H	(revision 10503)
++++ FL/x.H	(revision 10504)
+@@ -132,6 +132,7 @@
+   XFontStruct *ptr;
+ };
+ extern FL_EXPORT Fl_XFont_On_Demand fl_xfont;
++extern FL_EXPORT XFontStruct* fl_X_core_font();
+ 
+ // this object contains all X-specific stuff about a window:
+ // Warning: this object is highly subject to change!  
diff --git a/fltk-1.3.3-no_undefined.patch b/fltk-1.3.3-no_undefined.patch
new file mode 100644
index 0000000..7037bc8
--- /dev/null
+++ b/fltk-1.3.3-no_undefined.patch
@@ -0,0 +1,22 @@
+diff -up fltk-1.3.3/configure.in.no_undefined fltk-1.3.3/configure.in
+--- fltk-1.3.3/configure.in.no_undefined	2014-10-30 09:07:58.000000000 -0500
++++ fltk-1.3.3/configure.in	2015-02-18 14:03:42.617667667 -0600
+@@ -1194,6 +1194,18 @@ if test -n "$GCC"; then
+ 	AC_MSG_RESULT(no))
+     CFLAGS="$OLDCFLAGS"
+ 
++    dnl Experimental (as of 17 Feb 2015):
++    dnl Make sure that shared libraries don't have undefined references
++    # See if ld supports -no-undefined...
++    AC_MSG_CHECKING(if ld supports -no-undefined)
++    OLDLDFLAGS="$LDFLAGS"
++    LDFLAGS="$LDFLAGS -Wl,-no-undefined"
++    AC_TRY_LINK(,,
++        [DSOFLAGS="$DSOFLAGS -Wl,-no-undefined"]
++        AC_MSG_RESULT(yes),
++        AC_MSG_RESULT(no))
++    LDFLAGS="$OLDLDFLAGS"
++
+     # See if ld supports -Bsymbolic-functions...
+     AC_MSG_CHECKING(if ld supports -Bsymbolic-functions)
+     OLDLDFLAGS="$LDFLAGS"
diff --git a/fltk.spec b/fltk.spec
index 30de712..ed74706 100644
--- a/fltk.spec
+++ b/fltk.spec
@@ -9,7 +9,7 @@
 Summary:	C++ user interface toolkit
 Name:		fltk
 Version:	1.3.3
-Release:	1%{?dist}
+Release:	2%{?dist}
 
 # see COPYING (or http://www.fltk.org/COPYING.php ) for exceptions details
 License:	LGPLv2+ with exceptions	
@@ -29,6 +29,10 @@ Source1: fltk-config.sh
 Patch1:        	fltk-1.3.2-fltk_config.patch
 Patch5: 	fltk-1.1.8-fluid_desktop.patch
 
+## upstream patches
+Patch100: fltk-1.3.3-no_undefined.patch
+Patch101: fltk-1.3-L3156.patch
+
 BuildRequires: desktop-file-utils
 BuildRequires: libjpeg-devel
 BuildRequires: pkgconfig(libpng)
@@ -80,6 +84,9 @@ Requires: %{name}-devel
 
 %patch1 -p1 -b .fltk_config
 %patch5 -p1 -b .fluid_desktop
+%patch100 -p1 -b .no_undefined
+%patch101 -p0 -b .L3156
+
 
 # verbose build output
 sed -i.silent '\,^.SILENT:,d' makeinclude.in
@@ -192,6 +199,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &> /dev/null || :
 
 
 %changelog
+* Wed Feb 18 2015 Rex Dieter <rdieter@fedoraproject.org> 1.3.3-2
+- pull in upstream fixes for undefined symbols
+
 * Fri Feb 13 2015 Rex Dieter <rdieter@fedoraproject.org> 1.3.3-1
 - 1.3.3