diff --git a/common/JackFifo.cpp b/common/JackFifo.cpp
index 3a072ef3..d2c1dc75 100755
--- a/common/JackFifo.cpp
+++ b/common/JackFifo.cpp
@@ -96,7 +96,7 @@ bool JackFifo::TimedWait(long usec)
     if (fPoll.revents & POLLIN) {
         return Wait();
     } else {
-        jack_error("JackFifo::TimedWait fails name = %s revents %ld ", fName, fPoll.revents);
+        jack_error("JackFifo::TimedWait name = %s usec = %ld revents %ld ", fName, usec, fPoll.revents);
         return false;
     }
 }
diff --git a/macosx/JackMachSemaphore.cpp b/macosx/JackMachSemaphore.cpp
index abcfc788..aa57902d 100644
--- a/macosx/JackMachSemaphore.cpp
+++ b/macosx/JackMachSemaphore.cpp
@@ -78,7 +78,7 @@ bool JackMachSemaphore::TimedWait(long usec)
     time.tv_nsec = (usec % 1000000) * 1000;
     assert(fSemaphore > 0);
     if ((res = semaphore_timedwait(fSemaphore, time)) != KERN_SUCCESS) {
-        jack_error("JackMachSemaphore::TimedWait name = %s err = %s", fName, mach_error_string(res));
+        jack_error("JackMachSemaphore::TimedWait name = %s usec = %ld err = %s", fName, usec, mach_error_string(res));
     }
     return (res == KERN_SUCCESS);
 }