diff --git a/Source/CursesDialog/form/CMakeLists.txt b/Source/CursesDialog/form/CMakeLists.txt
index 0cddc9e752..618aef2f1d 100644
--- a/Source/CursesDialog/form/CMakeLists.txt
+++ b/Source/CursesDialog/form/CMakeLists.txt
@@ -50,9 +50,3 @@ TARGET_LINK_LIBRARIES(cmForm ${CURSES_LIBRARY})
 IF(CURSES_EXTRA_LIBRARY)
   TARGET_LINK_LIBRARIES(cmForm ${CURSES_EXTRA_LIBRARY})
 ENDIF(CURSES_EXTRA_LIBRARY)
-
-# DISABLING UNTIL A TRY-COMPILE CAN DETERMINE IF IT IS SAFE
-# See internal_stdio_core.h.in for explanation.
-#CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/internal_stdio_core.h.in
-#               ${CMAKE_CURRENT_BINARY_DIR}/internal/stdio_core.h
-#               @ONLY IMMEDIATE)
diff --git a/Source/CursesDialog/form/internal_stdio_core.h.in b/Source/CursesDialog/form/internal_stdio_core.h.in
deleted file mode 100644
index ae5910c3b8..0000000000
--- a/Source/CursesDialog/form/internal_stdio_core.h.in
+++ /dev/null
@@ -1,5 +0,0 @@
-/* This is a hack to work around a bug in MIPSpro 7.4 on some SGIs.
-   We need to include stdarg.h before the stdio core to avoid putting
-   va_list in the std namespace and never in the global namespace.  */
-#include <stdarg.h>
-#include_next <internal/stdio_core.h>
diff --git a/Utilities/cmxmlrpc/CMakeLists.txt b/Utilities/cmxmlrpc/CMakeLists.txt
index 86a7870aba..f23bf97adb 100644
--- a/Utilities/cmxmlrpc/CMakeLists.txt
+++ b/Utilities/cmxmlrpc/CMakeLists.txt
@@ -77,12 +77,6 @@ CONFIGURE_FILE(
   "${CMAKE_CURRENT_BINARY_DIR}/xmlrpc_amconfig.h"
   )
 
-# DISABLING UNTIL A TRY-COMPILE CAN DETERMINE IF IT IS SAFE
-# See internal_stdio_core.h.in for explanation.
-#CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/internal_stdio_core.h.in
-#               ${CMAKE_CURRENT_BINARY_DIR}/internal/stdio_core.h
-#               @ONLY IMMEDIATE)
-
 SET(xmlrpc_SRCS
   #XmlRpcCpp.cpp
   xmlrpc_array.c
diff --git a/Utilities/cmxmlrpc/internal_stdio_core.h.in b/Utilities/cmxmlrpc/internal_stdio_core.h.in
deleted file mode 100644
index ae5910c3b8..0000000000
--- a/Utilities/cmxmlrpc/internal_stdio_core.h.in
+++ /dev/null
@@ -1,5 +0,0 @@
-/* This is a hack to work around a bug in MIPSpro 7.4 on some SGIs.
-   We need to include stdarg.h before the stdio core to avoid putting
-   va_list in the std namespace and never in the global namespace.  */
-#include <stdarg.h>
-#include_next <internal/stdio_core.h>