diff --git a/src/hotspot/share/gc/g1/g1CollectedHeap.inline.hpp b/src/hotspot/share/gc/g1/g1CollectedHeap.inline.hpp
index b8e4ad9bef1ce..aa0f20d904b7f 100644
--- a/src/hotspot/share/gc/g1/g1CollectedHeap.inline.hpp
+++ b/src/hotspot/share/gc/g1/g1CollectedHeap.inline.hpp
@@ -320,13 +320,12 @@ inline bool G1CollectedHeap::is_collection_set_candidate(const HeapRegion* r) co
   BOOL_TO_STR(SafepointSynchronize::is_at_safepoint()),                       \
   BOOL_TO_STR(Thread::current()->is_VM_thread())
 
-DEBUG_ONLY(
+#ifdef ASSERT
 inline void G1CollectedHeap::assert_heap_locked() {
   assert(Heap_lock->owned_by_self(),
           heap_locking_asserts_params("should be holding the Heap_lock"));
-})
+}
 
-DEBUG_ONLY(
 inline void G1CollectedHeap::
 assert_heap_locked_or_at_safepoint(bool should_be_vm_thread) {
   assert(Heap_lock->owned_by_self() ||
@@ -334,47 +333,41 @@ assert_heap_locked_or_at_safepoint(bool should_be_vm_thread) {
             ((should_be_vm_thread) == Thread::current()->is_VM_thread())),
           heap_locking_asserts_params("should be holding the Heap_lock or "
                                       "should be at a safepoint"));
-})
+}
 
-DEBUG_ONLY(
 inline void G1CollectedHeap::assert_heap_locked_and_not_at_safepoint() {
   assert(Heap_lock->owned_by_self() &&
                                   !SafepointSynchronize::is_at_safepoint(),
         heap_locking_asserts_params("should be holding the Heap_lock and "
                                       "should not be at a safepoint"));
-})
+}
 
-DEBUG_ONLY(
 inline void G1CollectedHeap::assert_heap_not_locked() {
   assert(!Heap_lock->owned_by_self(),
       heap_locking_asserts_params("should not be holding the Heap_lock"));
-})
+}
 
-DEBUG_ONLY(
 inline void G1CollectedHeap::assert_heap_not_locked_and_not_at_safepoint() {
   assert(!Heap_lock->owned_by_self() &&
                                   !SafepointSynchronize::is_at_safepoint(),
     heap_locking_asserts_params("should not be holding the Heap_lock and "
                                   "should not be at a safepoint"));
-})
+}
 
-DEBUG_ONLY(
 inline void G1CollectedHeap::assert_at_safepoint_on_vm_thread() {
   assert_at_safepoint();
   assert(Thread::current_or_null() != nullptr, "no current thread");
   assert(Thread::current()->is_VM_thread(), "current thread is not VM thread");
-})
+}
 
-DEBUG_ONLY(
 inline void G1CollectedHeap::
 assert_used_and_recalculate_used_equal(G1CollectedHeap* g1h) {
-#ifdef ASSERT
   size_t cur_used_bytes = g1h->used();
   size_t recal_used_bytes = g1h->recalculate_used();
   assert(cur_used_bytes == recal_used_bytes, "Used(" SIZE_FORMAT ") is not"
           " same as recalculated used(" SIZE_FORMAT ").",
           cur_used_bytes, recal_used_bytes);
-#endif
-})
+}
+#endif // ASSERT
 
 #endif // SHARE_GC_G1_G1COLLECTEDHEAP_INLINE_HPP
diff --git a/src/hotspot/share/gc/g1/g1MonotonicArenaFreeMemoryTask.cpp b/src/hotspot/share/gc/g1/g1MonotonicArenaFreeMemoryTask.cpp
index 90100f701d4be..2e85dd6a57bf3 100644
--- a/src/hotspot/share/gc/g1/g1MonotonicArenaFreeMemoryTask.cpp
+++ b/src/hotspot/share/gc/g1/g1MonotonicArenaFreeMemoryTask.cpp
@@ -25,7 +25,7 @@
 #include "precompiled.hpp"
 #include "ci/ciUtilities.hpp"
 #include "gc/g1/g1CardSetMemory.inline.hpp"
-#include "gc/g1/g1CollectedHeap.hpp"
+#include "gc/g1/g1CollectedHeap.inline.hpp"
 #include "gc/g1/g1MonotonicArenaFreeMemoryTask.hpp"
 #include "gc/g1/g1MonotonicArenaFreePool.hpp"
 #include "gc/g1/g1_globals.hpp"