diff --git a/platformspecifics/u32/u32backend.cpp b/platformspecifics/u32/u32backend.cpp
index 5919a9d..90150d7 100644
--- a/platformspecifics/u32/u32backend.cpp
+++ b/platformspecifics/u32/u32backend.cpp
@@ -29,12 +29,12 @@ WId PlatformBackend::getActiveWID() {
     return (WId)GetForegroundWindow();
 }
 
-QString illegal(QStringLiteral("<>:\"/\|?*"));
+QString illegal(QStringLiteral("<>:\"/\\|?*"));
 QStringList illegalNames({ "CON",  "PRN",  "AUX",  "NUL",  "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7",
                            "COM8", "COM9", "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9" });
 
-bool PlatformBackend::filenamValid(QString name) {
-    unsigned int periods = 0;
+bool PlatformBackend::filenameValid(QString name) {
+    int periods = 0;
     for (QChar c : name) {
         if (c == '.') periods++;
         if (illegal.contains(c)) return false;