diff --git a/src/detection/terminalshell/terminalshell.c b/src/detection/terminalshell/terminalshell.c
index 92bd7294e..f4c8a076e 100644
--- a/src/detection/terminalshell/terminalshell.c
+++ b/src/detection/terminalshell/terminalshell.c
@@ -22,9 +22,11 @@
 
 static bool getFileVersion(const FFstrbuf* exePath, const wchar_t* stringName, FFstrbuf* version)
 {
-    wchar_t exePathW[PATH_MAX];
+    wchar_t exePathW[PATH_MAX + 1];
     int len = MultiByteToWideChar(CP_UTF8, 0, exePath->chars, (int)exePath->length, exePathW, ARRAY_SIZE(exePathW));
     if (len <= 0) return false;
+    assert(len < (int) ARRAY_SIZE(exePathW));
+    exePathW[len] = L'\0';
     return ffGetFileVersion(exePathW, stringName, version);
 }