diff --git a/lib/libc_r/test/sem_d.c b/lib/libc_r/test/sem_d.c
index 1551ae809e5..b834591852d 100644
--- a/lib/libc_r/test/sem_d.c
+++ b/lib/libc_r/test/sem_d.c
@@ -35,8 +35,6 @@
  *
  ****************************************************************************/
 
-#define _REENTRANT
-
 #include <assert.h>
 #include <stdio.h>
 #include <fcntl.h>
diff --git a/lib/libkse/test/sem_d.c b/lib/libkse/test/sem_d.c
index 1551ae809e5..b834591852d 100644
--- a/lib/libkse/test/sem_d.c
+++ b/lib/libkse/test/sem_d.c
@@ -35,8 +35,6 @@
  *
  ****************************************************************************/
 
-#define _REENTRANT
-
 #include <assert.h>
 #include <stdio.h>
 #include <fcntl.h>
diff --git a/lib/libpthread/test/sem_d.c b/lib/libpthread/test/sem_d.c
index 1551ae809e5..b834591852d 100644
--- a/lib/libpthread/test/sem_d.c
+++ b/lib/libpthread/test/sem_d.c
@@ -35,8 +35,6 @@
  *
  ****************************************************************************/
 
-#define _REENTRANT
-
 #include <assert.h>
 #include <stdio.h>
 #include <fcntl.h>