diff --git a/src/services/services.ts b/src/services/services.ts
index 0ffd1138cba..0fd4df19907 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -469,7 +469,8 @@ namespace ts {
 
             function pushDocCommentLineText(docComments: SymbolDisplayPart[], text: string, blankLineCount: number) {
                 // Add the empty lines in between texts
-                while (blankLineCount--) {
+                while (blankLineCount) {
+                    blankLineCount--;
                     docComments.push(textPart(""));
                 }