diff --git a/hosts/common/programs/gthumb.nix b/hosts/common/programs/gthumb.nix
index 01084602..66fcb4e2 100644
--- a/hosts/common/programs/gthumb.nix
+++ b/hosts/common/programs/gthumb.nix
@@ -3,8 +3,11 @@
   sane.programs.gthumb = {
     # compile without webservices to avoid the expensive webkitgtk dependency
     package = pkgs.gthumb.override { withWebservices = false; };
-    mime.associations."image/heif" = "org.gnome.gThumb.desktop";  # apple codec
-    mime.associations."image/png" = "org.gnome.gThumb.desktop";
-    mime.associations."image/jpeg" = "org.gnome.gThumb.desktop";
+    mime.associations = {
+      "image/heif" = "org.gnome.gThumb.desktop";  # apple codec
+      "image/png" = "org.gnome.gThumb.desktop";
+      "image/jpeg" = "org.gnome.gThumb.desktop";
+      "image/svg+xml" = "org.gnome.gThumb.desktop";
+    };
   };
 }