diff --git a/Dh_Haskell.sh b/Dh_Haskell.sh
index eba8c30..ca9be57 100644
--- a/Dh_Haskell.sh
+++ b/Dh_Haskell.sh
@@ -419,8 +419,11 @@ haddock_recipe(){
     # local PS5=$PS4; PS4=" + haddock_recipe> "; set -x
     hc=`packages_hc`
     haddock=`hc_haddock ${hc}`
-    [ ! -x /usr/bin/${haddock} ] || run ${DEB_SETUP_BIN_NAME} haddock --builddir=dist-${hc} --with-haddock=/usr/bin/${haddock} --with-ghc=${hc} ${DEB_HADDOCK_OPTS} || \
-          echo "Haddock failed (no modules?), creating empty documentation package."
+    if [ -x /usr/bin/${haddock} ] && \
+          ! run ${DEB_SETUP_BIN_NAME} haddock --builddir=dist-${hc} --with-haddock=/usr/bin/${haddock} --with-ghc=${hc} ${DEB_HADDOCK_OPTS} ; then
+       echo "Haddock failed (no modules?), refusing to create empty documentation package."
+       exit 1
+    fi
     # PS4=$PS5
 }