diff --git a/lib/isc/include/isc/time.h b/lib/isc/include/isc/time.h
index 9470903152..5de7ab6970 100644
--- a/lib/isc/include/isc/time.h
+++ b/lib/isc/include/isc/time.h
@@ -25,8 +25,8 @@ enum {
 	MS_PER_SEC = 1000,		 /*%< Milliseonds per second. */
 	US_PER_MS = 1000,		 /*%< Microseconds per millisecond. */
 	US_PER_SEC = 1000 * 1000,	 /*%< Microseconds per second. */
-	NS_PER_US = 1000,		 /*%< Nanoseconds per millisecond. */
-	NS_PER_MS = 1000 * 1000,	 /*%< Nanoseconds per microsecond. */
+	NS_PER_US = 1000,		 /*%< Nanoseconds per microsecond. */
+	NS_PER_MS = 1000 * 1000,	 /*%< Nanoseconds per millisecond. */
 	NS_PER_SEC = 1000 * 1000 * 1000, /*%< Nanoseconds per second. */
 };