diff --git a/pkgs/applications/graphics/giv/default.nix b/pkgs/applications/graphics/giv/default.nix
index a6cf6b205dc0..d32ef5bbebc9 100644
--- a/pkgs/applications/graphics/giv/default.nix
+++ b/pkgs/applications/graphics/giv/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
     sed -i s,/usr/local,$out, SConstruct 
   '';
 
-  patches = [ ./build.patch ];
+  patches = [ ./build.patch ./union.patch ];
 
   buildPhase = "scons";
 
diff --git a/pkgs/applications/graphics/giv/union.patch b/pkgs/applications/graphics/giv/union.patch
new file mode 100644
index 000000000000..f12fce036135
--- /dev/null
+++ b/pkgs/applications/graphics/giv/union.patch
@@ -0,0 +1,38 @@
+Already reported uptream
+
+diff --git a/src/giv-data.h b/src/giv-data.h
+index 64e7696..d34bfe4 100644
+--- a/src/giv-data.h
++++ b/src/giv-data.h
+@@ -88,7 +88,7 @@ typedef struct
+ typedef struct
+ {
+   gint op;
+-  union
++  struct
+   {
+     struct
+     {
+diff --git a/src/giv_types.h b/src/giv_types.h
+index 02abebe..c3cfb78 100644
+--- a/src/giv_types.h
++++ b/src/giv_types.h
+@@ -11,13 +11,11 @@ typedef struct {
+ 
+ typedef struct {
+   gint op;
+-  union {
+-    struct {
+-      gdouble x,y;
+-    } point;
+-    double arc_dev;
+-    text_mark_t *text_object;
+-  } data;
++  struct {
++    gdouble x,y;
++  } point;
++  double arc_dev;
++  text_mark_t *text_object;
+ } point_t;
+ 
+ typedef struct {