diff --git a/m4/dune.m4 b/m4/dune.m4
index 3e53f04ae9c3c6e657cec26b328a6cb9508a7a37..5087c190e711bb1e1a4be8817e3c0e6d29c3a798 100644
--- a/m4/dune.m4
+++ b/m4/dune.m4
@@ -220,7 +220,7 @@ AC_DEFUN([DUNE_CHECK_MODULES],[
   if test "x$_DUNE_MODULE[]_VERSION" != "x"; then
 	txt="$txt version $_DUNE_MODULE[]_VERSION"
   fi
-  DUNE_SUMMARY="$DUNE_SUMMARY echo '$txt';"
+  [DUNE_SUMMARY="$DUNE_SUMMARY echo '$txt';"]
 
   # remove local variables
   m4_popdef([_dune_name])
diff --git a/m4/dune_all.m4 b/m4/dune_all.m4
index ccd5029f65e4d769ff3bf441419bbc696c9c458b..fa51a2166853a9030feb2ebd2051ca1188023f91 100644
--- a/m4/dune_all.m4
+++ b/m4/dune_all.m4
@@ -165,7 +165,7 @@ AC_DEFUN([DUNE_SUMMARY_ALL],[
   echo
   echo "-----------------------------"
   echo  
-  eval $DUNE_SUMMARY
+  [eval $DUNE_SUMMARY]
   echo "ALBERTA..........: $with_alberta"
   echo "ALUGrid..........: $with_alugrid"
   echo "AmiraMesh........: $with_amiramesh"