diff --git a/tools/winedump/dump.c b/tools/winedump/dump.c
index 96457a0f51f..fe861904c5e 100644
--- a/tools/winedump/dump.c
+++ b/tools/winedump/dump.c
@@ -79,7 +79,7 @@ void dump_data( const unsigned char *ptr, unsigned int size, const char *prefix
     printf( "\n" );
 }
 
-const char *get_time_str(const unsigned long _t)
+const char *get_time_str(unsigned long _t)
 {
     const time_t    t = (const time_t)_t;
     const char      *str = ctime(&t);