diff --git a/pkgs/development/libraries/gdome2/default.nix b/pkgs/development/libraries/gdome2/default.nix
index a7dd1f980138..5aa1c487b4f9 100644
--- a/pkgs/development/libraries/gdome2/default.nix
+++ b/pkgs/development/libraries/gdome2/default.nix
@@ -18,7 +18,10 @@ stdenv.mkDerivation {
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ glib libxml2 gtk-doc ];
   propagatedBuildInputs = [glib libxml2];
-  patches = [ ./xml-document.patch ];
+  patches = [
+    ./xml-document.patch
+    ./fno-common.patch
+  ];
 
   meta = with lib; {
     homepage = "http://gdome2.cs.unibo.it/";
diff --git a/pkgs/development/libraries/gdome2/fno-common.patch b/pkgs/development/libraries/gdome2/fno-common.patch
new file mode 100644
index 000000000000..f9dc93c48fcf
--- /dev/null
+++ b/pkgs/development/libraries/gdome2/fno-common.patch
@@ -0,0 +1,11 @@
+On gcc-10 -fno-common is the default which forbids miltiple definitions.
+--- a/libgdome/xpath/gdome-xpath-xpnsresolv.h
++++ b/libgdome/xpath/gdome-xpath-xpnsresolv.h
+@@ -42,6 +42,6 @@ void gdome_xpath_xpnsresolv_ref (GdomeXPathNSResolver *self, GdomeException *exc
+ void gdome_xpath_xpnsresolv_unref (GdomeXPathNSResolver *self, GdomeException *exc);
+ GdomeDOMString * gdome_xpath_xpnsresolv_lookupNamespaceURI( GdomeXPathNSResolver *self, GdomeDOMString *prefix, GdomeException *exc);
+ 
+-const GdomeXPathNSResolverVtab gdome_xpath_xpnsresolv_vtab;
++extern const GdomeXPathNSResolverVtab gdome_xpath_xpnsresolv_vtab;
+ 
+ #endif /* GDOME_XPNSRESOLV_FILE */