diff --git a/src/libCom/misc/cantProceed.c b/src/libCom/misc/cantProceed.c
index ebb8a44ed..b72dbfe29 100644
--- a/src/libCom/misc/cantProceed.c
+++ b/src/libCom/misc/cantProceed.c
@@ -28,7 +28,7 @@ epicsShareFunc void * callocMustSucceed(size_t count, size_t size, const char *m
             errlogPrintf("%s: callocMustSucceed(%lu, %lu) - calloc failed\n",
                     msg, (unsigned long)count, (unsigned long)size);
             errlogPrintf("Thread %s (%p) suspending.\n",
-                    epicsThreadGetNameSelf(), epicsThreadGetIdSelf());
+                    epicsThreadGetNameSelf(), (void *)epicsThreadGetIdSelf());
             errlogFlush();
             epicsThreadSuspendSelf();
         }
@@ -44,7 +44,7 @@ epicsShareFunc void * mallocMustSucceed(size_t size, const char *msg)
             errlogPrintf("%s: mallocMustSucceed(%lu) - malloc failed\n",
                 msg, (unsigned long)size);
             errlogPrintf("Thread %s (%p) suspending.\n",
-                    epicsThreadGetNameSelf(), epicsThreadGetIdSelf());
+                    epicsThreadGetNameSelf(), (void *)epicsThreadGetIdSelf());
             errlogFlush();
             epicsThreadSuspendSelf();
         }
@@ -61,7 +61,7 @@ epicsShareFunc void cantProceed(const char *msg, ...)
     va_end(pvar);
     
     errlogPrintf("Thread %s (%p) can't proceed, suspending.\n",
-            epicsThreadGetNameSelf(), epicsThreadGetIdSelf());
+            epicsThreadGetNameSelf(), (void *)epicsThreadGetIdSelf());
     errlogFlush();
     
     epicsThreadSleep(1.0);
diff --git a/src/libCom/taskwd/taskwd.c b/src/libCom/taskwd/taskwd.c
index 08dc564c9..882951224 100644
--- a/src/libCom/taskwd/taskwd.c
+++ b/src/libCom/taskwd/taskwd.c
@@ -236,7 +236,7 @@ void taskwdRemove(epicsThreadId tid)
 
     epicsThreadGetName(tid, tName, sizeof(tName));
     errlogPrintf("taskwdRemove: Thread %s (%p) not registered!\n",
-        tName, tid);
+        tName, (void *)tid);
 }
 
 
@@ -378,7 +378,7 @@ epicsShareFunc void taskwdShow(int level)
             epicsThreadGetName(pt->tid, tName, sizeof(tName));
             printf("%16.16s %9s %12p %12p %12p\n",
                 tName, pt->suspended ? "Suspended" : "Ok ",
-                pt->tid, pt->callback, pt->usr);
+                (void *)pt->tid, (void *)pt->callback, pt->usr);
             pt = (struct tNode *)ellNext(&pt->node);
         }
     }