diff --git a/build/valgrind/cross-architecture.sup b/build/valgrind/cross-architecture.sup
index 891aa5be4a4..2bd6e3e001e 100644
--- a/build/valgrind/cross-architecture.sup
+++ b/build/valgrind/cross-architecture.sup
@@ -202,12 +202,6 @@
    fun:_ZN22nsComponentManagerImpl17ManifestComponentERNS_25ManifestProcessingContextEiPKPc
    ...
 }
-{
-   Bug 799157
-   Memcheck:Cond
-   fun:_ZN2js3ion5Range6updateEPKS1_
-   ...
-}
 {
    Bug 803386
    Memcheck:Free