diff --git a/cabal-tweak-drop-dep b/cabal-tweak-drop-dep
index 3bc5d58..04d95bc 100755
--- a/cabal-tweak-drop-dep
+++ b/cabal-tweak-drop-dep
@@ -22,7 +22,7 @@ if [ ! -f $CABALFILE.orig ]; then
     BACKUP=.orig
 fi
 
-if grep $DEP $CABALFILE | sed -e "s/$DEP//" | grep -q -e "[A-Za-z]"; then
+if grep "$DEP" $CABALFILE | sed -e "s/$DEP//" | grep -q -e "[A-Za-z]"; then
     echo "$0: deleting whole $DEP lines not safe - try more precise pattern"
     exit 1
 fi
diff --git a/ghc-rpm-macros.spec b/ghc-rpm-macros.spec
index 73ef3f6..17fa5db 100644
--- a/ghc-rpm-macros.spec
+++ b/ghc-rpm-macros.spec
@@ -10,7 +10,7 @@
 #%%global without_hscolour 1
 
 Name:           ghc-rpm-macros
-Version:        1.8.5
+Version:        1.8.6
 Release:        1%{?dist}
 Summary:        RPM macros for building Haskell packages for GHC
 
@@ -162,6 +162,9 @@ EOF
 
 
 %changelog
+* Mon Jan 29 2018 Jens Petersen <petersen@redhat.com> - 1.8.6-1
+- cabal-tweak-drop-dep: quote grep pattern to allow whitespace
+
 * Sun Jan 28 2018 Jens Petersen <petersen@redhat.com> - 1.8.5-1
 - re-enable _ghcdynlibdir (for ghc-8.2)