diff --git a/application/palemoon/branding/shared/pref/uaoverrides.inc b/application/palemoon/branding/shared/pref/uaoverrides.inc
index b6d1938a8c..1ff48f9e79 100644
--- a/application/palemoon/branding/shared/pref/uaoverrides.inc
+++ b/application/palemoon/branding/shared/pref/uaoverrides.inc
@@ -71,6 +71,7 @@ pref("@GUAO_PREF@.youtube.com","Mozilla/5.0 (%OS_SLICE% rv:@GK_VERSION@) @GK_SLI
 pref("@GUAO_PREF@.studio.youtube.com","Mozilla/5.0 (%OS_SLICE% rv:@GK_VERSION@) @GK_SLICE@ @GRE_VERSION_SLICE@ @FX_SLICE@ @PM_SLICE@");
 
 // The following domains do not like the Goanna slice
+pref("@GUAO_PREF@.dictionary.cambridge.org","Mozilla/5.0 (%OS_SLICE% rv:@GK_VERSION@) @GK_SLICE@ @FX_SLICE@");
 pref("@GUAO_PREF@.hitbox.tv","Mozilla/5.0 (%OS_SLICE% rv:@GK_VERSION@) @GK_SLICE@ @FX_SLICE@");
 pref("@GUAO_PREF@.yuku.com","Mozilla/5.0 (%OS_SLICE% rv:@GK_VERSION@) @GK_SLICE@ @FX_SLICE@ @PM_SLICE@");