diff --git a/pkgs/development/compilers/gcc/4.6/builder.sh b/pkgs/development/compilers/gcc/4.6/builder.sh
index bdf15be5a99..de4566c12dd 100644
--- a/pkgs/development/compilers/gcc/4.6/builder.sh
+++ b/pkgs/development/compilers/gcc/4.6/builder.sh
@@ -33,7 +33,7 @@ if test "$noSysDirs" = "1"; then
 
         # The path to the Glibc binaries such as `crti.o'.
         glibc_libdir="$(cat $NIX_GCC/nix-support/orig-libc)/lib"
-        
+
     else
         # Hack: support impure environments.
         extraFlags="-isystem /usr/include"
@@ -214,7 +214,7 @@ postInstall() {
     # previous gcc.
     rm -rf $out/libexec/gcc/*/*/install-tools
     rm -rf $out/lib/gcc/*/*/install-tools
-    
+
     # More dependencies with the previous gcc or some libs (gccbug stores the build command line)
     rm -rf $out/bin/gccbug
     # Take out the bootstrap-tools from the rpath, as it's not needed at all having $out
@@ -240,6 +240,11 @@ postInstall() {
         fi
     done
 
+    # Disable RANDMMAP on grsec, which causes segfaults when using
+    # precompiled headers.
+    # See https://bugs.gentoo.org/show_bug.cgi?id=301299#c31
+    paxmark r $out/libexec/gcc/*/*/{cc1,cc1plus}
+
     eval "$postInstallGhdl"
 }
 
diff --git a/pkgs/development/compilers/gcc/4.6/default.nix b/pkgs/development/compilers/gcc/4.6/default.nix
index af111322698..ef75cf71f58 100644
--- a/pkgs/development/compilers/gcc/4.6/default.nix
+++ b/pkgs/development/compilers/gcc/4.6/default.nix
@@ -99,7 +99,7 @@ let version = "4.6.3";
         withAbi = if gccAbi != null then " --with-abi=${gccAbi}" else "";
         withFpu = if gccFpu != null then " --with-fpu=${gccFpu}" else "";
         withFloat = if gccFloat != null then " --with-float=${gccFloat}" else "";
-      in 
+      in
         (withArch +
         withCpu +
         withAbi +
diff --git a/pkgs/development/compilers/gcc/4.8/builder.sh b/pkgs/development/compilers/gcc/4.8/builder.sh
index b781fa6c7ef..7c9b9420dda 100644
--- a/pkgs/development/compilers/gcc/4.8/builder.sh
+++ b/pkgs/development/compilers/gcc/4.8/builder.sh
@@ -239,6 +239,11 @@ postInstall() {
         fi
     done
 
+    # Disable RANDMMAP on grsec, which causes segfaults when using
+    # precompiled headers.
+    # See https://bugs.gentoo.org/show_bug.cgi?id=301299#c31
+    paxmark r $out/libexec/gcc/*/*/{cc1,cc1plus}
+
     eval "$postInstallGhdl"
 }