rts/IPE: Fix unused mutex warning

1 files changed, 2 insertions, 1 deletions

diff --git a/rts/IPE.c b/rts/IPE.c
index 63df8be700..47674e9c7f 100644
--- a/rts/IPE.c
+++ b/rts/IPE.c
@@ -57,7 +57,6 @@ this all IPE lists of all IpeBufferListNode are traversed to insert all IPEs.
 After the content of a IpeBufferListNode has been inserted, it's freed.
 */
 
-static Mutex ipeMapLock;
 static HashTable *ipeMap = NULL;
 
 // Accessed atomically
@@ -65,6 +64,8 @@ static IpeBufferListNode *ipeBufferList = NULL;
 
 #if defined(THREADED_RTS)
 
+static Mutex ipeMapLock;
+
 void initIpe(void) { initMutex(&ipeMapLock); }
 
 void exitIpe(void) { closeMutex(&ipeMapLock); }