diff --git a/src/main/java/org/jabref/Launcher.java b/src/main/java/org/jabref/Launcher.java
index a8926ae2e3e..8f1ea3229c7 100644
--- a/src/main/java/org/jabref/Launcher.java
+++ b/src/main/java/org/jabref/Launcher.java
@@ -140,7 +140,8 @@ private static void addLogToDisk() {
                 "level", isDebugEnabled ? "debug" : "info",
                 "writerFile", "rolling file",
                 "writerFile.level", isDebugEnabled ? "debug" : "info",
-                "writerFile.file", directory.resolve("log_{date:yyyy-MM-dd_HH-mm-ss}.txt").toString(),
+                // We need to manually join the path, because ".resolve" does not work on Windows, because ":" is not allowed in file names on Windows
+                "writerFile.file", directory + File.separator + "log_{date:yyyy-MM-dd_HH-mm-ss}.txt",
                 "writerFile.charset", "UTF-8",
                 "writerFile.policies", "startup",
                 "writerFile.backups", "30");