diff --git a/bin/pull-monotonic b/bin/pull-monotonic
index 0796415..83a8991 100755
--- a/bin/pull-monotonic
+++ b/bin/pull-monotonic
@@ -1,7 +1,7 @@
 #!/bin/bash
 set -eux
 cd "$( dirname "${BASH_SOURCE[0]}" )/.."
-version=${1-"8447153178046158fe10d927cd358e0088587bca"}
+version=${1-"5c0322dc559bf961f7e111d97cd3ed9ab5c1a73b"}
 path="./eventlet/support/monotonic.py"
 url="https://raw.githubusercontent.com/atdt/monotonic/${version}/monotonic.py"
 rm -f ${path}
diff --git a/eventlet/support/monotonic.py b/eventlet/support/monotonic.py
index d843d82..1c1b46b 100644
--- a/eventlet/support/monotonic.py
+++ b/eventlet/support/monotonic.py
@@ -150,6 +150,8 @@ except AttributeError:
                 CLOCK_MONOTONIC = 4
             elif 'bsd' in sys.platform:
                 CLOCK_MONOTONIC = 3
+            elif sys.platform.startswith('aix'):
+                CLOCK_MONOTONIC = ctypes.c_longlong(10)
 
             def monotonic():
                 """Monotonic clock, cannot go backward."""