diff --git a/src/xercesc/runConfigure b/src/xercesc/runConfigure
index f88d744c0fe305a45d277b37a5acf2dbbf2cf4b0..f1ccad5784b369c1ce9cd536bfcceaccf6c4f832 100755
--- a/src/xercesc/runConfigure
+++ b/src/xercesc/runConfigure
@@ -264,6 +264,8 @@ if test $debug = "off"; then
          debugflag="-w -O2";
       elif test $platform = "aix"; then
          debugflag="-w -O2";
+      elif test $platform = "hp-11"; then
+         debugflag="-w +O1";         
       else
          debugflag="-w -O";
       fi