diff --git a/include/spdk/util.h b/include/spdk/util.h
index 8b52dc358..993d10ac1 100644
--- a/include/spdk/util.h
+++ b/include/spdk/util.h
@@ -44,6 +44,8 @@
 extern "C" {
 #endif
 
+#define SPDK_CACHE_LINE_SIZE 64
+
 #define spdk_min(a,b) (((a)<(b))?(a):(b))
 #define spdk_max(a,b) (((a)>(b))?(a):(b))
 
diff --git a/lib/event/reactor.c b/lib/event/reactor.c
index 3695c93e6..05adadb5b 100644
--- a/lib/event/reactor.c
+++ b/lib/event/reactor.c
@@ -81,7 +81,7 @@ struct spdk_reactor {
 
 	/* The last known rusage values */
 	struct rusage					rusage;
-} __attribute__((aligned(64)));
+} __attribute__((aligned(SPDK_CACHE_LINE_SIZE)));
 
 static struct spdk_reactor *g_reactors;
 static struct spdk_cpuset *g_reactor_core_mask;
diff --git a/lib/vhost/vhost_internal.h b/lib/vhost/vhost_internal.h
index 6d15249bb..c81409e55 100644
--- a/lib/vhost/vhost_internal.h
+++ b/lib/vhost/vhost_internal.h
@@ -42,11 +42,10 @@
 #include "spdk_internal/vhost_user.h"
 #include "spdk_internal/log.h"
 #include "spdk/event.h"
+#include "spdk/util.h"
 #include "spdk/rpc.h"
 #include "spdk/config.h"
 
-#define SPDK_CACHE_LINE_SIZE RTE_CACHE_LINE_SIZE
-
 #define SPDK_VHOST_MAX_VQUEUES	256
 #define SPDK_VHOST_MAX_VQ_SIZE	1024