diff --git a/src/hotspot/share/gc/shared/ageTable.cpp b/src/hotspot/share/gc/shared/ageTable.cpp
index 376aaa16391c6..34e4bb91887a0 100644
--- a/src/hotspot/share/gc/shared/ageTable.cpp
+++ b/src/hotspot/share/gc/shared/ageTable.cpp
@@ -72,8 +72,8 @@ void AgeTable::clear() {
 }
 
 #ifndef PRODUCT
-bool AgeTable::is_clear() {
-  for (size_t* p = sizes; p < sizes + table_size; ++p) {
+bool AgeTable::is_clear() const {
+  for (const size_t* p = sizes; p < sizes + table_size; ++p) {
     if (*p != 0) return false;
   }
   return true;
diff --git a/src/hotspot/share/gc/shared/ageTable.hpp b/src/hotspot/share/gc/shared/ageTable.hpp
index 20d444350858d..decade6ee8581 100644
--- a/src/hotspot/share/gc/shared/ageTable.hpp
+++ b/src/hotspot/share/gc/shared/ageTable.hpp
@@ -56,7 +56,7 @@ class AgeTable: public CHeapObj<mtGC> {
 
 #ifndef PRODUCT
   // check whether it's clear
-  bool is_clear();
+  bool is_clear() const;
 #endif // !PRODUCT
 
   // add entry