diff --git a/indra/cmake/00-Common.cmake b/indra/cmake/00-Common.cmake
index edb9b8f00d..15cadda692 100755
--- a/indra/cmake/00-Common.cmake
+++ b/indra/cmake/00-Common.cmake
@@ -176,7 +176,7 @@ if (LINUX)
       OUTPUT_STRIP_TRAILING_WHITESPACE)
 
   #<FS:ND> Gentoo defines _FORTIFY_SOURCE by default
-  if (NOT ${GXX_VERSION} MATCHES "Gentoo 4.[789].*")
+  if (NOT ( ${GXX_VERSION} MATCHES "Gentoo 4.[789].*" OR ${GXX_VERSION} MATCHES "Gentoo 5.3.*" ) )
   #</FS:ND>
 
   if (${GXX_VERSION} STREQUAL ${CXX_VERSION})
@@ -188,7 +188,7 @@ if (LINUX)
   endif (${GXX_VERSION} STREQUAL ${CXX_VERSION})
 
   #<FS:ND> Gentoo defines _FORTIFY_SOURCE by default
-  endif (NOT ${GXX_VERSION} MATCHES "Gentoo 4.[789].*")
+  endif (NOT ( ${GXX_VERSION} MATCHES "Gentoo 4.[789].*" OR ${GXX_VERSION} MATCHES "Gentoo 5.3.*" ) )
   #</FS:ND>
 
   # Let's actually get a numerical version of gxx's version