diff --git a/README.md b/README.md
index 224593eb915..6fa264a99d1 100644
--- a/README.md
+++ b/README.md
@@ -72,7 +72,7 @@ fetch snapshots, and an OS that can execute the available snapshot binaries.
 Snapshot binaries are currently built and tested on several platforms:
 
 * Windows (7, 8, Server 2008 R2), x86 only
-* Linux (various distributions), x86 and x86-64
+* Linux (2.6.18 or later, various distributions), x86 and x86-64
 * OSX 10.7 (Lion) or greater, x86 and x86-64
 
 You may find that other platforms work, but these are our officially
diff --git a/doc/tutorial.md b/doc/tutorial.md
index 08ce6e2a69f..ff36511a319 100644
--- a/doc/tutorial.md
+++ b/doc/tutorial.md
@@ -73,7 +73,7 @@ from the Internet on our supported platforms.
 Snapshot binaries are currently built and tested on several platforms:
 
 * Windows (7, 8, Server 2008 R2), x86 only
-* Linux (various distributions), x86 and x86-64
+* Linux (2.6.18 or later, various distributions), x86 and x86-64
 * OSX 10.7 (Lion) or greater, x86 and x86-64
 
 You may find that other platforms work, but these are our "tier 1"