diff --git a/runtime/oti/j9porterror.h b/runtime/oti/j9porterror.h
index f294accf802..feea14ff2b5 100644
--- a/runtime/oti/j9porterror.h
+++ b/runtime/oti/j9porterror.h
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 1998, 2015 IBM Corp. and others
+ * Copyright (c) 1998, 2017 IBM Corp. and others
  *
  * This program and the accompanying materials are made available under
  * the terms of the Eclipse Public License 2.0 which accompanies this
@@ -245,15 +245,15 @@
  * 	0xFFF5xxxx for __getipc (zOS)
  * @{
  */
-#define J9PORT_ERROR_SYSV_IPC_FTOK_ERROR (-2 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT)
-#define J9PORT_ERROR_SYSV_IPC_SEMGET_ERROR (-3 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT)
-#define J9PORT_ERROR_SYSV_IPC_SEMCTL_ERROR (-4 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT)
-#define J9PORT_ERROR_SYSV_IPC_SEMOP_ERROR (-5 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT)
-#define J9PORT_ERROR_SYSV_IPC_SHMGET_ERROR (-6 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT)
-#define J9PORT_ERROR_SYSV_IPC_SHMCTL_ERROR (-7 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT)
-#define J9PORT_ERROR_SYSV_IPC_SHMAT_ERROR (-8 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT)
-#define J9PORT_ERROR_SYSV_IPC_SHMDT_ERROR (-9 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT)
-#define J9PORT_ERROR_SYSV_IPC_GETIPC_ERROR (-10 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT)
+#define J9PORT_ERROR_SYSV_IPC_FTOK_ERROR ((I_32)((U_32)-2 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT))
+#define J9PORT_ERROR_SYSV_IPC_SEMGET_ERROR ((I_32)((U_32)-3 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT))
+#define J9PORT_ERROR_SYSV_IPC_SEMCTL_ERROR ((I_32)((U_32)-4 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT))
+#define J9PORT_ERROR_SYSV_IPC_SEMOP_ERROR ((I_32)((U_32)-5 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT))
+#define J9PORT_ERROR_SYSV_IPC_SHMGET_ERROR ((I_32)((U_32)-6 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT))
+#define J9PORT_ERROR_SYSV_IPC_SHMCTL_ERROR ((I_32)((U_32)-7 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT))
+#define J9PORT_ERROR_SYSV_IPC_SHMAT_ERROR ((I_32)((U_32)-8 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT))
+#define J9PORT_ERROR_SYSV_IPC_SHMDT_ERROR ((I_32)((U_32)-9 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT))
+#define J9PORT_ERROR_SYSV_IPC_GETIPC_ERROR ((I_32)((U_32)-10 << J9PORT_ERROR_SYSTEM_CALL_CODE_SHIFT))
 
 #define J9PORT_ERROR_SYSV_IPC_ERRNO_BASE -750
 #define J9PORT_ERROR_SYSV_IPC_ERRNO_EACCES (J9PORT_ERROR_SYSV_IPC_ERRNO_BASE)
diff --git a/runtime/port/sysvipc/j9shmem.c b/runtime/port/sysvipc/j9shmem.c
index 42b8d43be8c..e25f790e413 100644
--- a/runtime/port/sysvipc/j9shmem.c
+++ b/runtime/port/sysvipc/j9shmem.c
@@ -1613,14 +1613,16 @@ openSharedMemory (J9PortLibrary *portLibrary, intptr_t fd, const char *baseFile,
 				goto failDontUnlink;
 			}
 		} else {
-#if defined (__GNUC__) || defined (AIXPPC)
-#if defined (__GNUC__)
-			/*Use .__key for __GNUC__*/
-			if (buf.shm_perm.__key != controlinfo->common.ftok_key)
-#endif
-#if defined (AIXPPC)
+#if defined(__GNUC__) || defined(AIXPPC)
+#if defined(OSX)
+			/*Use ._key for OSX*/
+			if (buf.shm_perm._key != controlinfo->common.ftok_key)
+#elif defined(AIXPPC)
 			/*Use .key for AIXPPC*/
 			if (buf.shm_perm.key != controlinfo->common.ftok_key)
+#elif defined(__GNUC__)
+			/*Use .__key for __GNUC__*/
+			if (buf.shm_perm.__key != controlinfo->common.ftok_key)
 #endif
 			{
 				Trc_PRT_shmem_j9shmem_openSharedMemory_Msg("The <key,id> pair in our control file is no longer valid.");
diff --git a/runtime/port/sysvipc/j9shsem_deprecated.c b/runtime/port/sysvipc/j9shsem_deprecated.c
index df4116f8a5f..ded21cee931 100644
--- a/runtime/port/sysvipc/j9shsem_deprecated.c
+++ b/runtime/port/sysvipc/j9shsem_deprecated.c
@@ -1077,18 +1077,19 @@ openSemaphore(struct J9PortLibrary *portLibrary, intptr_t fd, char *baseFile, j9
 				goto failDontUnlink;
 			}
 		} else {
-#if defined (__GNUC__) || defined (AIXPPC) || defined(J9ZTPF)
-#if defined (__GNUC__) && !defined(J9ZTPF)
-			/*Use .__key for __GNUC__*/
-			if (buf.sem_perm.__key != controlinfo->ftok_key)
-#endif
-#if defined (AIXPPC)
+#if defined(__GNUC__) || defined(AIXPPC) || defined(J9ZTPF)
+#if defined(OSX)
+			/*Use _key for OSX*/
+			if (buf.sem_perm._key != controlinfo->ftok_key)
+#elif defined(AIXPPC)
 			/*Use .key for AIXPPC*/
 			if (buf.sem_perm.key != controlinfo->ftok_key)
-#endif
-#if defined(J9ZTPF)
-            /*Use .key for z/TPF */
+#elif defined(J9ZTPF)
+			/*Use .key for z/TPF */
 			if (buf.key != controlinfo->ftok_key)
+#elif defined(__GNUC__)
+			/*Use .__key for __GNUC__*/
+			if (buf.sem_perm.__key != controlinfo->ftok_key)
 #endif
 			{
 				Trc_PRT_shsem_j9shsem_opensemaphore_Msg("The <key,id> pair in our control file is no longer valid.");