Fix typo.

diff --git a/src/expressions/evaluate.c b/src/expressions/evaluate.c
index cfde2c1feb504f7d77042129705eaec295d61f7b..d5ee125ef769a76cf87f6ddf98e76d17bbb93ace 100644 (file)
--- a/src/expressions/evaluate.c
+++ b/src/expressions/evaluate.c
@@ -290,7 +290,7 @@ expr_debug_print_postfix (const struct expression *e)
         case OP_string:
           fprintf (stderr, "s<%.*s>",
                    (int) op->string.length,
-                   op->string.string != NULL : op->string.string : "");
+                   op->string.string != NULL ? op->string.string : "");
           break;
         case OP_format:
           fprintf (stderr, "f<%s%d.%d>",