diff --git a/tools/install.sh b/tools/install.sh
index b9f74c7..22f1328 100755
--- a/tools/install.sh
+++ b/tools/install.sh
@@ -34,7 +34,7 @@ RM="/bin/rm"
 RMOPTS="-rf"
 
 SED="/usr/bin/sed"
-SEDOPTS="-i ''"
+SEDOPTS="-i''"
 SEDEXPR="s@$DEFDIR@$PREFIX@g"
 
 builtin cd ..
diff --git a/tools/test.sh b/tools/test.sh
index bdaeb71..131c063 100755
--- a/tools/test.sh
+++ b/tools/test.sh
@@ -15,7 +15,7 @@ MDLDIR="/usr/local/opt/git-follow/src"
 SRCDIR="src"
 
 SED="/usr/bin/sed"
-SEDOPTS="-i ''"
+SEDOPTS="-i''"
 SEDEXPR="s@$MDLDIR@$SRCDIR@g"
 
 # Update 'use lib' directive to 'src' for testing purposes.