diff --git a/auto/os/linux b/auto/os/linux
index 6dd51a429..62bc6253b 100644
--- a/auto/os/linux
+++ b/auto/os/linux
@@ -24,7 +24,7 @@ version=${version:-0}
 
 # enable the rt signals on Linux between 2.2.19 and 2.6.17
 
-if [ \( $version -ge 131609 -a $version -lt 132632 \) -o $EVENT_RTSIG = YES ]
+if [ \( $version -ge 131603 -a $version -lt 132626 \) -o $EVENT_RTSIG = YES ]
 then
     echo " + rt signals found"
     have=NGX_HAVE_RTSIG . auto/have