diff --git a/src/template/hpux b/src/template/hpux
index 3e26ff80dbdede45e69ba8b321c592b5fe836dbe..db43432a5e87260ca00ec8cf606ead52d30dcbe2 100644
--- a/src/template/hpux
+++ b/src/template/hpux
@@ -3,5 +3,6 @@ if test "$GCC" = yes ; then
   CCC=g++
 else
   CC="$CC -Ae"
+  CFLAGS=+O2
   CCC=aCC
 fi