diff --git a/Makefile b/Makefile
index 92ec7d0b5..306c3c929 100644
--- a/Makefile
+++ b/Makefile
@@ -60,7 +60,7 @@ else # !COMSPEC
 endif # COMSPEC
 
 ifndef CXXFLAGS
-    CXXFLAGS=-pedantic -Wall -Wextra -Wabi -Wcast-qual -Wconversion -Wfloat-equal -Winline -Wmissing-declarations -Wmissing-format-attribute -Wno-long-long -Woverloaded-virtual -Wpacked -Wredundant-decls -Wshadow -Wsign-promo $(CPPCHK_GLIBCXX_DEBUG) -g
+    CXXFLAGS=-pedantic -Wall -Wextra -Wabi -Wcast-qual -Wconversion -Wfloat-equal -Winline -Wmissing-declarations -Wmissing-format-attribute -Wno-long-long -Woverloaded-virtual -Wpacked -Wredundant-decls -Wshadow -Wsign-promo -std=c++11 $(CPPCHK_GLIBCXX_DEBUG) -g
 endif
 
 ifeq ($(HAVE_RULES),yes)
diff --git a/tools/dmake.cpp b/tools/dmake.cpp
index 3d6b56700..457232e57 100644
--- a/tools/dmake.cpp
+++ b/tools/dmake.cpp
@@ -290,7 +290,7 @@ int main(int argc, char **argv)
 
     // Makefile settings..
     if (release) {
-        makeConditionalVariable(fout, "CXXFLAGS", "-O2 -DNDEBUG -Wall");
+        makeConditionalVariable(fout, "CXXFLAGS", "-O2 -DNDEBUG -Wall -std=c++11");
     } else {
         // TODO: add more compiler warnings.
         // -Wlogical-op       : doesn't work on older GCC
@@ -316,6 +316,7 @@ int main(int argc, char **argv)
 //                                "-Wsign-conversion "
                                 "-Wsign-promo "
 //                                "-Wunreachable-code "
+                                "-std=c++11 "
                                 "$(CPPCHK_GLIBCXX_DEBUG) "
                                 "-g");
     }