Index: interp.c
--- interp.c.orig
+++ interp.c
@@ -2066,7 +2066,7 @@ str_search(char *s, int firstrow, int firstcol, int la
 		    *line = '\0';
 	    }
 	}
-	if (!col_hidden[c])
+	if (!col_hidden[c]) {
 	    if (gs.g_type == G_STR) {
 		if (p && p->label
 #if defined(REGCOMP)
@@ -2099,6 +2099,7 @@ str_search(char *s, int firstrow, int firstcol, int la
 #endif
 #endif
 		    break;
+        }
 	if (r == endr && c == endc) {
 	    error("String not found");
 #if defined(REGCOMP)
@@ -2475,7 +2476,7 @@ constant(register struct enode *e)
 	 e == NULL
 	 || e->op == O_CONST
 	 || e->op == O_SCONST
-	 || e->op == 'm' && constant(e->e.o.left)
+	 || (e->op == 'm' && constant(e->e.o.left))
 	 || (
 	     e->op != O_VAR
 	     && !(e->op & REDUCE)