diff --git a/Makefile.tinydtls b/Makefile.tinydtls
index 88affc4..ee7b6de 100644
--- a/Makefile.tinydtls
+++ b/Makefile.tinydtls
@@ -32,5 +32,5 @@
 
 # This activates debugging support
 # CFLAGS += -DNDEBUG
-tinydtls_src += debug.c
+tinydtls_src += dtls_debug.c