diff --git a/src/setup-dotnet.ts b/src/setup-dotnet.ts
index 092bf59..0e8edb6 100644
--- a/src/setup-dotnet.ts
+++ b/src/setup-dotnet.ts
@@ -111,7 +111,7 @@ function getVersionFromGlobalJson(globalJsonPath: string): string {
     version = globalJson.sdk.version;
     const rollForward = globalJson.sdk.rollForward;
     if (rollForward && rollForward.startsWith('latest')) {
-      const [major, minor, featurePatch] = version.split('.');
+      const [major, minor, featurePatch] = (version || '').split('.');
       const feature = featurePatch.substring(0, 1);
       
       switch (rollForward) {