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-rw-r--r--src/cmd/pic/picl.lx2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/cmd/pic/picl.lx b/src/cmd/pic/picl.lx
index da29d246..45130f24 100644
--- a/src/cmd/pic/picl.lx
+++ b/src/cmd/pic/picl.lx
@@ -248,7 +248,7 @@ WS [ \t]
pbstr(p->s_val.p);
dprintf("pushing back `%s'\n", p->s_val.p);
}
- } else if (islower(yytext[0])) {
+ } else if (islower((unsigned char)yytext[0])) {
yylval.p = tostring(yytext);
return(VARNAME);
} else {