diff --git a/flang/include/flang/Common/interval.h b/flang/include/flang/Common/interval.h
index 9d819f0364915..c4cab0ccf1130 100644
--- a/flang/include/flang/Common/interval.h
+++ b/flang/include/flang/Common/interval.h
@@ -103,7 +103,7 @@ template <typename A> class Interval {
     return {start_, std::min(size_, n)};
   }
   Interval Suffix(std::size_t n) const {
-    CHECK(n <= size_);
+    n = std::min(n, size_);
     return {start_ + n, size_ - n};
   }