diff --git a/src/openrct2/platform/posix.c b/src/openrct2/platform/posix.c
index 2b5124b440..219a10225b 100644
--- a/src/openrct2/platform/posix.c
+++ b/src/openrct2/platform/posix.c
@@ -282,10 +282,6 @@ bool platform_lock_single_instance()
         log_warning("Cannot open lock file for writing.");
         return false;
     }
-    #define   LOCK_SH   1    /* shared lock */
-    #define   LOCK_EX   2    /* exclusive lock */
-    #define   LOCK_NB   4    /* don't block when locking */
-    #define   LOCK_UN   8    /* unlock */
     
     struct flock lock;
 
@@ -294,10 +290,11 @@ bool platform_lock_single_instance()
     lock.l_type = F_WRLCK;
     lock.l_whence = SEEK_SET;
 
-    if (fcntl(pidFile, F_SETLK, &lock) == -1) {
+    if (fcntl(pidFile, F_SETLK, &lock) == -1) 
+    {
         if (errno == EWOULDBLOCK) {
             log_warning("Another OpenRCT2 session has been found running.");
-                return false;
+            return false;
         }
         log_error("flock returned an uncatched errno: %d", errno);
         return false;