diff --git a/lib/extensions/ras/std_err_record.c b/lib/extensions/ras/std_err_record.c
index 209cb73..9fdfd6b 100644
--- a/lib/extensions/ras/std_err_record.c
+++ b/lib/extensions/ras/std_err_record.c
@@ -56,7 +56,7 @@
 		((unsigned int) read_erridr_el1()) & ERRIDR_MASK;
 
 	assert(idx_start < max_idx);
-	assert(check_u32_overflow(idx_start, num_idx));
+	assert(check_u32_overflow(idx_start, num_idx) == 0);
 	assert((idx_start + num_idx - 1U) < max_idx);
 
 	for (i = 0; i < num_idx; i++) {