Index: dw_cte.cpp
--- dw_cte.cpp.orig
+++ dw_cte.cpp
@@ -420,7 +420,7 @@ static int encode_base64(const char* aIn, size_t aInLe
         out[outPos++] = base64tab[c3 & 0x3F];
 		lineLen += 4;
         if (lineLen >= MAXLINE-3) {
-			char* cp = DW_EOL;
+			const char* cp = DW_EOL;
             out[outPos++] = *cp++;
 			if (*cp) {
 				out[outPos++] = *cp;
@@ -429,7 +429,7 @@ static int encode_base64(const char* aIn, size_t aInLe
         }
     }
     /* Encode the remaining one or two characters. */
-	char* cp;
+	const char* cp;
     switch (inLen % 3) {
     case 0:
 		cp = DW_EOL;