src/app/netcache/nc_memory.cpp |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/src/app/netcache/nc_memory.cpp b/src/app/netcache/nc_memory.cpp
index bb602ee..468b44d 100644
--- a/src/app/netcache/nc_memory.cpp
+++ b/src/app/netcache/nc_memory.cpp
@@ -3329,7 +3329,13 @@ void s_NCInitMallocHook(void)
     __free_hook    = s_NCFreeHook;
 }
 
-void (*__malloc_initialize_hook) (void) = s_NCInitMallocHook;
+/* GNU libc 2.14 defines this macro to declare hook variables as volatile.
+   Define it as empty for older libc versions.  */
+#ifndef __MALLOC_HOOK_VOLATILE
+# define __MALLOC_HOOK_VOLATILE
+#endif
+
+void (*__MALLOC_HOOK_VOLATILE __malloc_initialize_hook) (void) = s_NCInitMallocHook;
 
 #elif !defined(NCBI_OS_MSWIN)
 // Changing of C library allocation functions on Windows is very tricky (if