diff --git a/Sources/Sentry/SentrySerialization.m b/Sources/Sentry/SentrySerialization.m
index b6b45fdb86..507490bf0d 100644
--- a/Sources/Sentry/SentrySerialization.m
+++ b/Sources/Sentry/SentrySerialization.m
@@ -212,7 +212,7 @@ + (SentryEnvelope *_Nullable)envelopeWithData:(NSData *)data
             if (bodyLength > 0 && data.length < (i + 1 + bodyLength)) {
                 SENTRY_LOG_ERROR(@"Envelope is corrupted or has invalid data. Trying to read %li "
                                  @"bytes by skiping %li from a buffer of %li bytes.",
-                    (unsigned long)data.length, bodyLength, (long)(i + 1));
+                    (unsigned long)data.length, (unsigned long)bodyLength, (long)(i + 1));
                 return nil;
             }