diff --git a/lib/spack/spack/compilers/nag.py b/lib/spack/spack/compilers/nag.py
index 729aed0caf7..bbc291d7b6f 100644
--- a/lib/spack/spack/compilers/nag.py
+++ b/lib/spack/spack/compilers/nag.py
@@ -25,11 +25,6 @@ class Nag(Compiler):
     def openmp_flag(self):
         return "-openmp"
 
-    @property
-    def cxx11_flag(self):
-        tty.die("cxx11_flag() is not implemented for nag. Consider creating a pull-request.")
-        return "-std=c++11"
-
 
     @classmethod
     def default_version(self, comp):
diff --git a/lib/spack/spack/compilers/pgi.py b/lib/spack/spack/compilers/pgi.py
index 5ab4a9d1099..94c6b8365cd 100644
--- a/lib/spack/spack/compilers/pgi.py
+++ b/lib/spack/spack/compilers/pgi.py
@@ -50,7 +50,6 @@ def openmp_flag(self):
 
     @property
     def cxx11_flag(self):
-        tty.die("cxx11_flag() is not implemented for pgi. Consider creating a pull-request.")
         return "-std=c++11"