diff --git a/core-api/src/main/java/com/optimizely/ab/config/PollingProjectConfigManager.java b/core-api/src/main/java/com/optimizely/ab/config/PollingProjectConfigManager.java
index 0208d2986..b03aeabc0 100644
--- a/core-api/src/main/java/com/optimizely/ab/config/PollingProjectConfigManager.java
+++ b/core-api/src/main/java/com/optimizely/ab/config/PollingProjectConfigManager.java
@@ -100,7 +100,11 @@ void setConfig(ProjectConfig projectConfig) {
             return;
         }
 
-        logger.info("New datafile set with revision: {}. Old revision: {}", projectConfig.getRevision(), previousRevision);
+        if (oldProjectConfig == null) {
+            logger.info("New datafile set with revision: {}.", projectConfig.getRevision());
+        } else {
+            logger.info("New datafile set with revision: {}. Old revision: {}", projectConfig.getRevision(), previousRevision);
+        }
 
         currentProjectConfig.set(projectConfig);
         currentOptimizelyConfig.set(new OptimizelyConfigService(projectConfig).getConfig());