diff --git a/pkgs/applications/networking/browsers/firefox/wrapper.nix b/pkgs/applications/networking/browsers/firefox/wrapper.nix
index bc9cf8a326e..62bb722652a 100644
--- a/pkgs/applications/networking/browsers/firefox/wrapper.nix
+++ b/pkgs/applications/networking/browsers/firefox/wrapper.nix
@@ -257,7 +257,7 @@ let
 
         makeWrapper "$oldExe" \
           "$out${browser.execdir or "/bin"}/${browserName}${nameSuffix}" \
-            --suffix LD_LIBRARY_PATH ':' "$libs" \
+            --prefix LD_LIBRARY_PATH ':' "$libs" \
             --suffix-each GTK_PATH ':' "$gtk_modules" \
             --prefix PATH ':' "${xdg-utils}/bin" \
             --suffix PATH ':' "$out${browser.execdir or "/bin"}" \