diff --git a/libs/utils/CallStack.cpp b/libs/utils/CallStack.cpp
index 2fdaa71..55b6024 100644
--- a/libs/utils/CallStack.cpp
+++ b/libs/utils/CallStack.cpp
@@ -311,7 +311,8 @@
     } else { 
         void const* start = 0;
         name = MapInfo::mapAddressToName(ip, "<unknown>", &start);
-        snprintf(tmp, 256, "pc %08lx  %s", uintptr_t(ip)-uintptr_t(start), name);
+        snprintf(tmp, 256, "pc %08lx  %s", 
+                long(uintptr_t(ip)-uintptr_t(start)), name);
         res.append(tmp);
     }
     res.append("\n");