diff --git a/enc/jis/props.h b/enc/jis/props.h
index f4262f580d..19b1982ca6 100644
--- a/enc/jis/props.h
+++ b/enc/jis/props.h
@@ -54,7 +54,7 @@ enum onigenc_jis_ctype {
 
 enum {PropertyListNum = onigenc_jis_max - onigenc_jis_min - 1};
 
-static const OnigCodePoint* PropertyList[PropertyListNum] = {
+static const OnigCodePoint* const PropertyList[PropertyListNum] = {
     CR_Hiragana,
     CR_Katakana,
     CR_Han,
diff --git a/enc/jis/props.h.blt b/enc/jis/props.h.blt
index f4262f580d..19b1982ca6 100644
--- a/enc/jis/props.h.blt
+++ b/enc/jis/props.h.blt
@@ -54,7 +54,7 @@ enum onigenc_jis_ctype {
 
 enum {PropertyListNum = onigenc_jis_max - onigenc_jis_min - 1};
 
-static const OnigCodePoint* PropertyList[PropertyListNum] = {
+static const OnigCodePoint* const PropertyList[PropertyListNum] = {
     CR_Hiragana,
     CR_Katakana,
     CR_Han,
diff --git a/enc/jis/props.kwd b/enc/jis/props.kwd
index b2ddde50c9..f3235c0100 100644
--- a/enc/jis/props.kwd
+++ b/enc/jis/props.kwd
@@ -23,7 +23,7 @@ enum onigenc_jis_ctype {
 
 enum {PropertyListNum = onigenc_jis_max - onigenc_jis_min - 1};
 
-static const OnigCodePoint* PropertyList[PropertyListNum] = {
+static const OnigCodePoint* const PropertyList[PropertyListNum] = {
     CR_Hiragana,
     CR_Katakana,
     CR_Han,
diff --git a/enc/jis/props.src b/enc/jis/props.src
index b2ddde50c9..f3235c0100 100644
--- a/enc/jis/props.src
+++ b/enc/jis/props.src
@@ -23,7 +23,7 @@ enum onigenc_jis_ctype {
 
 enum {PropertyListNum = onigenc_jis_max - onigenc_jis_min - 1};
 
-static const OnigCodePoint* PropertyList[PropertyListNum] = {
+static const OnigCodePoint* const PropertyList[PropertyListNum] = {
     CR_Hiragana,
     CR_Katakana,
     CR_Han,