diff --git a/Makefile b/Makefile
index 7c5d28e..267466c 100644
--- a/Makefile
+++ b/Makefile
@@ -17,7 +17,7 @@ LIBDIR  = libs
 TESTDIR = tests
 BINDIR  = .
 
-SRCS     := $(shell find -L $(SRCDIR) $(LIBDIR) $(TESTDIR) -type f -name '*.c' | egrep -v 'deps/|build/' ) src/tests_autogen.c
+SRCS     := $(shell (echo src/tests_autogen.c; find -L $(SRCDIR) $(LIBDIR) $(TESTDIR) -type f -name '*.c' | egrep -v 'deps/|build/') | sort | uniq )
 INCS     := $(shell find -L $(SRCDIR) $(LIBDIR) $(TESTDIR) $(INCDIR) -type d -name 'include'| egrep -v 'deps/|build/' )
 INCFLAGS := $(patsubst %,-I %, $(INCS))
 OBJS     := $(patsubst %.c, build/%.o, $(SRCS))