1 files changed, 2 insertions, 0 deletions

diff --git a/miscutils/bc.c b/miscutils/bc.c
index c5288102d..1e2ca8b83 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -2950,6 +2950,8 @@ static BC_STATUS zbc_lex_identifier(BcLex *l)
                         continue;
  match:
                 // buf starts with keyword bc_lex_kws[i]
+                if (isalnum(buf[j]) || buf[j]=='_')
+                        continue; // "ifz" does not match "if" keyword, "if." does
                 l->t.t = BC_LEX_KEY_1st_keyword + i;
                 if (!bc_lex_kws_POSIX(i)) {
                         s = bc_posix_error_fmt("%sthe '%.8s' keyword", "POSIX does not allow ", bc_lex_kws[i].name8);