diff --git a/configure/CONFIG.gnuCommon b/configure/CONFIG.gnuCommon
index 7aac818b9..000232474 100644
--- a/configure/CONFIG.gnuCommon
+++ b/configure/CONFIG.gnuCommon
@@ -27,7 +27,7 @@ GPROF_CFLAGS_YES = -pg
 CODE_CFLAGS = $(PROF_CFLAGS_$(PROFILE)) $(GPROF_CFLAGS_$(GPROF))
 WARN_CFLAGS_YES = -Wall
 WARN_CFLAGS_NO = -w
-OPT_CFLAGS_YES = -O3
+OPT_CFLAGS_YES = -O3 -g
 OPT_CFLAGS_NO = -g
 
 PROF_CXXFLAGS_YES = -p
@@ -35,7 +35,7 @@ GPROF_CXXFLAGS_YES = -pg
 CODE_CXXFLAGS = $(PROF_CXXFLAGS_$(PROFILE)) $(GPROF_CXXFLAGS_$(GPROF))
 WARN_CXXFLAGS_YES = -Wall
 WARN_CXXFLAGS_NO = -w
-OPT_CXXFLAGS_YES = -O3
+OPT_CXXFLAGS_YES = -O3 -g
 OPT_CXXFLAGS_NO = -g
 
 CODE_LDFLAGS = $(PROF_CXXFLAGS_$(PROFILE)) $(GPROF_CXXFLAGS_$(GPROF))