diff --git a/misc/unictabl/mk_ctable.c b/misc/unictabl/mk_ctable.c
index 19b63326cc..9ee7418458 100644
--- a/misc/unictabl/mk_ctable.c
+++ b/misc/unictabl/mk_ctable.c
@@ -44,7 +44,7 @@ int main(int argc, char *argv[])
            " * %s to Unicode recoding table\n"
            " * based on file %s by Unicode Consortium\n"
            " */\n\n"
-           "static wxUint16 encoding_table__%s[128] = {",
+           "static const wxUint16 encoding_table__%s[128] = {",
            argv[2], argv[1], argv[2]);
            
     for (i = 128; i < 256; i++)
diff --git a/misc/unictabl/mk_encodings.sh b/misc/unictabl/mk_encodings.sh
index a7dc61a7ac..45d894953b 100755
--- a/misc/unictabl/mk_encodings.sh
+++ b/misc/unictabl/mk_encodings.sh
@@ -110,7 +110,7 @@ echo "
 
 static struct {
     wxFontEncoding encoding; // encoding identifier
-    wxUint16 *table;         // 8bit to unicode table
+    const wxUint16 *table;         // 8bit to unicode table
 } encodings_list[] = {
 " >> unictabl.inc
 
diff --git a/src/common/encconv.cpp b/src/common/encconv.cpp
index 9e06d0df43..f43d0687e4 100644
--- a/src/common/encconv.cpp
+++ b/src/common/encconv.cpp
@@ -50,7 +50,7 @@
     #include "wx/msw/wince/missing.h"       // for bsearch()
 #endif
 
-static wxUint16* GetEncTable(wxFontEncoding enc)
+static const wxUint16* GetEncTable(wxFontEncoding enc)
 {
 #ifdef __WXMAC__
     if( enc >= wxFONTENCODING_MACMIN && enc <= wxFONTENCODING_MACMAX )
@@ -98,7 +98,7 @@ CompareCharsetItems(const void *i1, const void *i2)
 }
 
 
-static CharsetItem* BuildReverseTable(wxUint16 *tbl)
+static CharsetItem* BuildReverseTable(const wxUint16 *tbl)
 {
     CharsetItem *rev = new CharsetItem[128];
 
@@ -124,7 +124,8 @@ wxEncodingConverter::wxEncodingConverter()
 bool wxEncodingConverter::Init(wxFontEncoding input_enc, wxFontEncoding output_enc, int method)
 {
     unsigned i;
-    wxUint16 *in_tbl, *out_tbl = NULL;
+    const wxUint16 *in_tbl;
+    const wxUint16 *out_tbl = NULL;
 
     if (m_Table) {delete[] m_Table; m_Table = NULL;}