diff --git a/libraries/AP_HAL_VRBRAIN/Semaphores.cpp b/libraries/AP_HAL_VRBRAIN/Semaphores.cpp
index fa35f2beedc41..ca29566930aa3 100644
--- a/libraries/AP_HAL_VRBRAIN/Semaphores.cpp
+++ b/libraries/AP_HAL_VRBRAIN/Semaphores.cpp
@@ -15,7 +15,7 @@ bool Semaphore::give()
 
 bool Semaphore::take(uint32_t timeout_ms) 
 {
-    if (timeout_ms == 0) {
+    if (timeout_ms == HAL_SEMAPHORE_BLOCK_FOREVER) {
         return pthread_mutex_lock(&_lock) == 0;
     }
     if (take_nonblocking()) {