--- espeak-1.40.02-source.old/src/synthdata.cpp
+++ espeak-1.40.02-source/src/synthdata.cpp
@@ -211,7 +211,7 @@
 	
 	while((value = phoneme_index[index++]) != 0)
 	{
-		if((code = (value & 0xff)) == other_phcode)
+		if((code = (0xFF & (int) value)) == other_phcode)
 		{
 			while(((value2 = phoneme_index[index]) != 0) && ((value2 & 0xff) < 8))
 			{