diff --git a/backend/escl/escl.c b/backend/escl/escl.c
index 7cc763dea..67df465f0 100644
--- a/backend/escl/escl.c
+++ b/backend/escl/escl.c
@@ -1083,7 +1083,7 @@ sane_read(SANE_Handle h, SANE_Byte *buf, SANE_Int maxlen, SANE_Int *len)
                        SANE_FALSE);
            handler->scanner->work = next_page;
            handler->ps.last_frame = !next_page;
-           if (handler->ps.last_frame = SANE_TRUE)
+           if (handler->ps.last_frame == SANE_TRUE)
               status = SANE_STATUS_EOF;
 	   else
               status = SANE_STATUS_NO_DOCS;