diff --git a/configure/os/CONFIG_SITE.Common.linux-x86 b/configure/os/CONFIG_SITE.Common.linux-x86
index 42cd32316..22f43822e 100644
--- a/configure/os/CONFIG_SITE.Common.linux-x86
+++ b/configure/os/CONFIG_SITE.Common.linux-x86
@@ -46,6 +46,7 @@ COMMANDLINE_LIBRARY = READLINE
 # This does cost disk space, but not memory as debug symbols are not
 # loaded into RAM when the binary is loaded.
 OPT_CFLAGS_YES += -g
+OPT_CXXFLAGS_YES += -g
 
 
 # Tune GNU compiler output for a specific cpu-type
diff --git a/configure/os/CONFIG_SITE.Common.linux-x86_64 b/configure/os/CONFIG_SITE.Common.linux-x86_64
index 64bf91185..482253242 100644
--- a/configure/os/CONFIG_SITE.Common.linux-x86_64
+++ b/configure/os/CONFIG_SITE.Common.linux-x86_64
@@ -46,3 +46,4 @@ COMMANDLINE_LIBRARY = READLINE
 # This does cost disk space, but not memory as debug symbols are not
 # loaded into RAM when the binary is loaded.
 OPT_CFLAGS_YES += -g
+OPT_CXXFLAGS_YES += -g