diff --git a/src/language/blockString.js b/src/language/blockString.js
index dba151a125f..d8ec8fb49dc 100644
--- a/src/language/blockString.js
+++ b/src/language/blockString.js
@@ -85,8 +85,12 @@ export function printBlockString(
   const isSingleLine = value.indexOf('\n') === -1;
   const hasLeadingSpace = value[0] === ' ' || value[0] === '\t';
   const hasTrailingQuote = value[value.length - 1] === '"';
+  const hasTrailingSlash = value[value.length - 1] === '\\';
   const printAsMultipleLines =
-    !isSingleLine || hasTrailingQuote || preferMultipleLines;
+    !isSingleLine ||
+    hasTrailingQuote ||
+    hasTrailingSlash ||
+    preferMultipleLines;
 
   let result = '';
   // Format a multi-line block quote to account for leading space.