diff --git a/dist/index.js b/dist/index.js
index 6634bb07..fc834e02 100755
--- a/dist/index.js
+++ b/dist/index.js
@@ -1350,7 +1350,9 @@ function getCommitMessage(mergeCommitMessage, pullRequest) {
   } else if (mergeCommitMessage === "pull-request-description") {
     return pullRequest.body;
   } else if (mergeCommitMessage === "pull-request-title-and-description") {
-    return pullRequest.title + "\n\n" + pullRequest.body;
+    return (
+      pullRequest.title + (pullRequest.body ? "\n\n" + pullRequest.body : "")
+    );
   } else {
     return mergeCommitMessage.replace(PR_PROPERTY, (_, prProp) =>
       resolvePath(pullRequest, prProp)
@@ -22088,7 +22090,7 @@ module.exports = JSON.parse('[[[0,44],"disallowed_STD3_valid"],[[45,46],"valid"]
 /***/ ((module) => {
 
 "use strict";
-module.exports = JSON.parse('{"name":"automerge-action","version":"0.15.0","description":"GitHub action to automatically merge pull requests","main":"lib/api.js","author":"Pascal","license":"MIT","private":true,"bin":{"automerge-action":"./bin/automerge.js"},"scripts":{"test":"jest","it":"node it/it.js","lint":"prettier -l lib/** test/** && eslint .","compile":"ncc build bin/automerge.js --license LICENSE -o dist","prepublish":"yarn lint && yarn test && yarn compile"},"dependencies":{"@actions/core":"^1.6.0","@octokit/rest":"^18.12.0","argparse":"^2.0.1","fs-extra":"^10.0.1","object-resolve-path":"^1.1.1","tmp":"^0.2.1"},"devDependencies":{"@vercel/ncc":"^0.33.3","dotenv":"^16.0.0","eslint":"^8.11.0","eslint-plugin-jest":"^26.1.3","jest":"^27.5.1","prettier":"^2.6.0"},"prettier":{"trailingComma":"none","arrowParens":"avoid"}}');
+module.exports = JSON.parse('{"name":"automerge-action","version":"0.15.1","description":"GitHub action to automatically merge pull requests","main":"lib/api.js","author":"Pascal","license":"MIT","private":true,"bin":{"automerge-action":"./bin/automerge.js"},"scripts":{"test":"jest","it":"node it/it.js","lint":"prettier -l lib/** test/** && eslint .","compile":"ncc build bin/automerge.js --license LICENSE -o dist","prepublish":"yarn lint && yarn test && yarn compile"},"dependencies":{"@actions/core":"^1.6.0","@octokit/rest":"^18.12.0","argparse":"^2.0.1","fs-extra":"^10.0.1","object-resolve-path":"^1.1.1","tmp":"^0.2.1"},"devDependencies":{"@vercel/ncc":"^0.33.3","dotenv":"^16.0.0","eslint":"^8.11.0","eslint-plugin-jest":"^26.1.3","jest":"^27.5.1","prettier":"^2.6.0"},"prettier":{"trailingComma":"none","arrowParens":"avoid"}}');
 
 /***/ })
 
diff --git a/lib/merge.js b/lib/merge.js
index 369033b6..2d96e022 100644
--- a/lib/merge.js
+++ b/lib/merge.js
@@ -379,7 +379,9 @@ function getCommitMessage(mergeCommitMessage, pullRequest) {
   } else if (mergeCommitMessage === "pull-request-description") {
     return pullRequest.body;
   } else if (mergeCommitMessage === "pull-request-title-and-description") {
-    return pullRequest.title + "\n\n" + pullRequest.body;
+    return (
+      pullRequest.title + (pullRequest.body ? "\n\n" + pullRequest.body : "")
+    );
   } else {
     return mergeCommitMessage.replace(PR_PROPERTY, (_, prProp) =>
       resolvePath(pullRequest, prProp)