diff --git a/cmake/TestLargeFiles.cmake b/cmake/TestLargeFiles.cmake
index ffef84f5..7960e52c 100644
--- a/cmake/TestLargeFiles.cmake
+++ b/cmake/TestLargeFiles.cmake
@@ -7,7 +7,7 @@
 #  _LARGE_FILES
 #  _LARGEFILE_SOURCE
 #  _FILE_OFFSET_BITS 64
-#  HAVE_FSEEKO
+#  OPJ_HAVE_FSEEKO
 #
 #  However, it is YOUR job to make sure these defines are set in a #cmakedefine so they
 #  end up in a config.h file that is included in your source if necessary!
@@ -113,10 +113,10 @@ macro(OPJ_TEST_LARGE_FILES VARIABLE)
         endif()
 
 	    if(FSEEKO_COMPILE_OK)
-                set(HAVE_FSEEKO ON CACHE INTERNAL "Result of test for fseeko/ftello")
+                set(OPJ_HAVE_FSEEKO ON CACHE INTERNAL "Result of test for fseeko/ftello")
         else()
                 message(STATUS "Checking for fseeko/ftello - not found")
-                set(HAVE_FSEEKO OFF CACHE INTERNAL "Result of test for fseeko/ftello")
+                set(OPJ_HAVE_FSEEKO OFF CACHE INTERNAL "Result of test for fseeko/ftello")
         endif()
 
 	    if(FILE64_OK AND FSEEKO_COMPILE_OK)
diff --git a/src/lib/openjp2/opj_config.h.cmake.in b/src/lib/openjp2/opj_config.h.cmake.in
index 83f7009c..aed6dbc5 100644
--- a/src/lib/openjp2/opj_config.h.cmake.in
+++ b/src/lib/openjp2/opj_config.h.cmake.in
@@ -3,19 +3,20 @@
 
 #define OPJ_PACKAGE_VERSION "@PACKAGE_VERSION@"
 
-#cmakedefine HAVE_INTTYPES_H @HAVE_INTTYPES_H@
-#cmakedefine HAVE_MEMORY_H @HAVE_MEMORY_H@
-#cmakedefine HAVE_STDLIB_H @HAVE_STDLIB_H@
-#cmakedefine HAVE_STRINGS_H @HAVE_STRINGS_H@
-#cmakedefine HAVE_STRING_H @HAVE_STRING_H@
-#cmakedefine HAVE_SYS_STAT_H @HAVE_SYS_STAT_H@
-#cmakedefine HAVE_SYS_TYPES_H @HAVE_SYS_TYPES_H@
-#cmakedefine HAVE_UNISTD_H @HAVE_UNISTD_H@
+/* Not used by openjp2*/
+/*#cmakedefine HAVE_INTTYPES_H @HAVE_INTTYPES_H@*/
+/*#cmakedefine HAVE_MEMORY_H @HAVE_MEMORY_H@*/
+/*#cmakedefine HAVE_STDLIB_H @HAVE_STDLIB_H@*/
+/*#cmakedefine HAVE_STRINGS_H @HAVE_STRINGS_H@*/
+/*#cmakedefine HAVE_STRING_H @HAVE_STRING_H@*/
+/*#cmakedefine HAVE_SYS_STAT_H @HAVE_SYS_STAT_H@*/
+/*#cmakedefine HAVE_SYS_TYPES_H @HAVE_SYS_TYPES_H@ */
+/*#cmakedefine HAVE_UNISTD_H @HAVE_UNISTD_H@*/
 
 #cmakedefine _LARGEFILE_SOURCE
 #cmakedefine _LARGE_FILES
 #cmakedefine _FILE_OFFSET_BITS @_FILE_OFFSET_BITS@
-#cmakedefine HAVE_FSEEKO @HAVE_FSEEKO@
+#cmakedefine OPJ_HAVE_FSEEKO @OPJ_HAVE_FSEEKO@
 
 
 /* Byte order.  */