diff --git a/build-support/functions/00-vars.sh b/build-support/functions/00-vars.sh
index 7fe4a7d80..517d07803 100644
--- a/build-support/functions/00-vars.sh
+++ b/build-support/functions/00-vars.sh
@@ -32,8 +32,10 @@ CONSUL_PKG_NAME="consul"
 if test "$(uname)" == "Darwin"
 then
    SED_EXT="-E"
+   alias sed_i="sed -i ''"
 else
    SED_EXT=""
+   alias sed_i="sed -i"
 fi
 
-CONSUL_BINARY_TYPE=oss
\ No newline at end of file
+CONSUL_BINARY_TYPE=oss
diff --git a/build-support/functions/10-util.sh b/build-support/functions/10-util.sh
index 2e89cbd15..f3cc2909e 100644
--- a/build-support/functions/10-util.sh
+++ b/build-support/functions/10-util.sh
@@ -623,7 +623,7 @@ function update_version {
    local version="$2"
    local prerelease="$3"
    
-   sed ${SED_EXT} -i "" -e "s/(Version[[:space:]]*=[[:space:]]*)\"[^\"]*\"/\1\"${version}\"/g" -e "s/(VersionPrerelease[[:space:]]*=[[:space:]]*)\"[^\"]*\"/\1\"${prerelease}\"/g" "${vfile}"
+   sed_i ${SED_EXT} -e "s/(Version[[:space:]]*=[[:space:]]*)\"[^\"]*\"/\1\"${version}\"/g" -e "s/(VersionPrerelease[[:space:]]*=[[:space:]]*)\"[^\"]*\"/\1\"${prerelease}\"/g" "${vfile}"
    return $?
 }
 
@@ -658,7 +658,7 @@ function set_changelog_version {
       rel_date=$(date +"%B %d, %Y")
    fi
    
-   sed ${SED_EXT} -i "" -e "s/## UNRELEASED/## ${version} (${rel_date})/" "${changelog}"
+   sed_i ${SED_EXT} -e "s/## UNRELEASED/## ${version} (${rel_date})/" "${changelog}"
    return $?
 }
 
@@ -678,7 +678,7 @@ function unset_changelog_version {
       return 1
    fi
    
-   sed ${SED_EXT} -i "" -e "1 s/^## [0-9]+\.[0-9]+\.[0-9]+ \([^)]*\)/## UNRELEASED/" "${changelog}"
+   sed_i ${SED_EXT} -e "1 s/^## [0-9]+\.[0-9]+\.[0-9]+ \([^)]*\)/## UNRELEASED/" "${changelog}"
    return $?
 }