diff --git a/c/src/exec/rtems/headers/support.h b/c/src/exec/rtems/headers/support.h
index b4f2a5a061..d5c9c494a0 100644
--- a/c/src/exec/rtems/headers/support.h
+++ b/c/src/exec/rtems/headers/support.h
@@ -84,6 +84,8 @@ extern "C" {
         TOD_MILLISECONDS_TO_MICROSECONDS(_ms)
 #define RTEMS_MILLISECONDS_TO_TICKS(_ms) \
         TOD_MILLISECONDS_TO_TICKS(_ms)
+#define RTEMS_MICROSECONDS_TO_TICKS(_ms) \
+        TOD_MICROSECONDS_TO_TICKS(_ms)
 
 #ifndef __RTEMS_APPLICATION__
 #include <rtems/rtems/support.inl>
diff --git a/c/src/exec/rtems/include/rtems/rtems/support.h b/c/src/exec/rtems/include/rtems/rtems/support.h
index b4f2a5a061..d5c9c494a0 100644
--- a/c/src/exec/rtems/include/rtems/rtems/support.h
+++ b/c/src/exec/rtems/include/rtems/rtems/support.h
@@ -84,6 +84,8 @@ extern "C" {
         TOD_MILLISECONDS_TO_MICROSECONDS(_ms)
 #define RTEMS_MILLISECONDS_TO_TICKS(_ms) \
         TOD_MILLISECONDS_TO_TICKS(_ms)
+#define RTEMS_MICROSECONDS_TO_TICKS(_ms) \
+        TOD_MICROSECONDS_TO_TICKS(_ms)
 
 #ifndef __RTEMS_APPLICATION__
 #include <rtems/rtems/support.inl>
diff --git a/cpukit/rtems/include/rtems/rtems/support.h b/cpukit/rtems/include/rtems/rtems/support.h
index b4f2a5a061..d5c9c494a0 100644
--- a/cpukit/rtems/include/rtems/rtems/support.h
+++ b/cpukit/rtems/include/rtems/rtems/support.h
@@ -84,6 +84,8 @@ extern "C" {
         TOD_MILLISECONDS_TO_MICROSECONDS(_ms)
 #define RTEMS_MILLISECONDS_TO_TICKS(_ms) \
         TOD_MILLISECONDS_TO_TICKS(_ms)
+#define RTEMS_MICROSECONDS_TO_TICKS(_ms) \
+        TOD_MICROSECONDS_TO_TICKS(_ms)
 
 #ifndef __RTEMS_APPLICATION__
 #include <rtems/rtems/support.inl>