1 files changed, 1 insertions, 1 deletions
diff --git a/rts/win32/OSMem.c b/rts/win32/OSMem.c
index c67b95be82..534cd15fa6 100644
--- a/rts/win32/OSMem.c
+++ b/rts/win32/OSMem.c
@@ -458,7 +458,7 @@ void *osReserveHeapMemory (void *startAddress, W_ *len)
             sysErrorBelch(
                 "osReserveHeapMemory: VirtualAlloc MEM_RESERVE %llu bytes \
                 at address %p bytes failed",
-                len + MBLOCK_SIZE, startAddress);
+                *len + MBLOCK_SIZE, startAddress);
         }
         stg_exit(EXIT_FAILURE);
     }