diff --git a/src/version.cc b/src/version.cc
index e00eb47..ca4f7ad 100644
--- a/src/version.cc
+++ b/src/version.cc
@@ -8,6 +8,7 @@ namespace fallout {
 // 0x4B4580
 void versionGetVersion(char* dest, size_t size)
 {
+    // SFALL: custom version string.
     char* versionString = nullptr;
     if (configGetString(&gSfallConfig, SFALL_CONFIG_MISC_KEY, SFALL_CONFIG_VERSION_STRING, &versionString)) {
         if (*versionString == '\0') {