diff --git a/compile.mk b/compile.mk
index 5c2902e..2b35de2 100644
--- a/compile.mk
+++ b/compile.mk
@@ -1,9 +1,9 @@
-CXXFLAGS_debug := -g -O0
-CXXFLAGS_release := -O2
+CXXFLAGS_debug += -g -O0
+CXXFLAGS_release += -O2
 CXXFLAGS += ${CXXFLAGS_${CONFIG}}
 
-CFLAGS_debug := -g -O0
-CFLAGS_release :=- O2
+CFLAGS_debug += -g -O0
+CFLAGS_release +=- O2
 CFLAGS += ${CFLAGS_${CONFIG}}
 
 CXX_OBJS := $(addprefix ${BUILD_DIR}/, $(subst .cpp,.o,$(CXX_SRCS)))
diff --git a/link.mk b/link.mk
index 98d1660..1c22227 100644
--- a/link.mk
+++ b/link.mk
@@ -1,7 +1,7 @@
 -include $(DEPS)
 
-LDFLAGS_release := 
-LDFLAGS_debug :=  -g
+LDFLAGS_release += 
+LDFLAGS_debug +=  -g
 LDFLAGS += ${LFLAGS_${CONFIG}}
 
 ${BUILD_DIR}/${TARGET}: ${OBJS} $(BUILD_DIR)