diff --git a/general/genlib/gsl.xml b/general/genlib/gsl.xml
index 0abd799a49..6b7f334721 100644
--- a/general/genlib/gsl.xml
+++ b/general/genlib/gsl.xml
@@ -9,7 +9,7 @@
   <!ENTITY gsl-md5sum        "bda73a3dd5ff2f30b5956764399db6e7">
   <!ENTITY gsl-size          "7.1 MB">
   <!ENTITY gsl-buildsize     "275 MB (with tests, without docs)">
-  <!ENTITY gsl-time          "2.1 SBU (with tests, without docs)">
+  <!ENTITY gsl-time          "1.7 SBU (with tests, without docs)">
 ]>
 
 <sect1 id="gsl" xreflabel="Gsl-&gsl-version;">