diff --git a/src/util.c b/src/util.c
index d6133e6..79afad6 100644
--- a/src/util.c
+++ b/src/util.c
@@ -772,7 +772,8 @@ static void recursive_mkdir(char *path, mode_t mode)
 
 void wm_logfile_init(const char *path)
 {
-    char *log_file_dir = dirname((char*)path);
+    char *dup = strdup(path);
+    char *log_file_dir = dirname(dup);
 
     if (access(path, F_OK) == 0) return;
 
@@ -785,6 +786,7 @@ void wm_logfile_init(const char *path)
         ret = close(ret);
         if (ret < 0) CREATE_LOGFILE_ERROR(strerror(errno));
 
+        free(dup);
         return;
     }
 
@@ -799,6 +801,8 @@ void wm_logfile_init(const char *path)
     } else {
         CREATE_LOGFILE_ERROR(strerror(errno));
     }
+
+    free(dup);
 }
 
 /* UIntArray<LogEntry*> */