diff --git a/frontend/apps/reader/modules/readerkoptlistener.lua b/frontend/apps/reader/modules/readerkoptlistener.lua
index 5b66b6e77..3ada332f7 100644
--- a/frontend/apps/reader/modules/readerkoptlistener.lua
+++ b/frontend/apps/reader/modules/readerkoptlistener.lua
@@ -59,9 +59,9 @@ end
 function ReaderKoptListener:onDocLangUpdate(lang)
     if lang == "chi_sim" or lang == "chi_tra" or
         lang == "jpn" or lang == "kor" then
-        self.document.configurable.word_spacing = DKOPTREADER_CONFIG_WORD_SAPCINGS[1]
+        self.document.configurable.word_spacing = DKOPTREADER_CONFIG_WORD_SPACINGS[1]
     else
-        self.document.configurable.word_spacing = DKOPTREADER_CONFIG_WORD_SAPCINGS[3]
+        self.document.configurable.word_spacing = DKOPTREADER_CONFIG_WORD_SPACINGS[3]
     end
 end