diff --git a/src/main/java/network/brightspots/rcv/OutputWriter.java b/src/main/java/network/brightspots/rcv/OutputWriter.java
index dcf4840f..46676f16 100644
--- a/src/main/java/network/brightspots/rcv/OutputWriter.java
+++ b/src/main/java/network/brightspots/rcv/OutputWriter.java
@@ -184,6 +184,9 @@ private String sanitizeSliceWithoutCollisions(String sliceId) {
         while (uniqueSanitizedIds.contains(sanitizedSliceId)) {
           sanitizedSliceId = String.format("%s_%d", sanitizeStringForOutput(sliceId), increment);
           increment++;
+        }
+
+        if (increment > 1) {
           Logger.warning("The sanitized filename for Precinct %s results is not unique"
                   + " and has been renamed to %s", sliceId, sanitizedSliceId);
         }