diff --git a/mission/tmtc/TmStore.cpp b/mission/tmtc/TmStore.cpp
index 4a0813b0..07fddcf0 100644
--- a/mission/tmtc/TmStore.cpp
+++ b/mission/tmtc/TmStore.cpp
@@ -72,7 +72,8 @@ ReturnValue_t TmStore::storePacket(PusTmReader& reader) {
       uint8_t appendedCounter = 1;
       path rolloverName;
       while (true) {
-        rolloverName = path(mostRecentFile.value().string() + std::to_string(appendedCounter));
+        rolloverName =
+            path(mostRecentFile.value().string() + "." + std::to_string(appendedCounter));
         if (not exists(rolloverName)) {
           break;
         }