diff --git a/make/defs.mk b/make/defs.mk
index 42469dd0..2187960a 100644
--- a/make/defs.mk
+++ b/make/defs.mk
@@ -138,6 +138,7 @@ CFLAGS      += $(LOCAL_CFLAGS) $(PROJECT_CFLAGS) $(YLIB_CFLAGS) $(INCLUDE)
 CPPFLAGS    += $(LOCAL_CPPFLAGS) $(PROJECT_CPPFLAGS)  $(YLIB_CPPFLAGS) $(INCLUDE)  
 LDFFTW    = -lrfftw -lfftw -lm
 #LDAUDIO   = -laudiofile
+CORE       = $(wildcard core core.*)
 
 ifeq ($(DEVELOPMENT),true)
 CFLAGS += $(CFLAGS_DEBUG)