diff --git a/Makefile.am b/Makefile.am
index 6d60a8302..4ba3d97cc 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -10,7 +10,7 @@ ACLOCAL_AMFLAGS = -I build-aux/m4
 .PHONY: deploy FORCE
 
 AM_LDFLAGS    = $(HARDENED_LDFLAGS) $(CORE_LDFLAGS) $(GMP_LDFLAGS)
-AM_CFLAGS     = $(DEBUG_FLAGS)
+AM_CFLAGS     = $(DEBUG_FLAGS) $(HARDENED_FLAGS)
 AM_CPPFLAGS   = $(CORE_CPPFLAGS) $(GMP_CPPFLAGS)
 AM_CXXFLAGS   = $(DEBUG_FLAGS) $(HARDENED_FLAGS) $(CORE_CXXFLAGS)
 PTHREAD_FLAGS = $(PTHREAD_CFLAGS) $(PTHREAD_LIBS)