diff --git a/Makefile b/Makefile
index ac7e7ab..6d25ef3 100644
--- a/Makefile
+++ b/Makefile
@@ -6,3 +6,6 @@ all: um
 
 um: src/um.c
 	$(CC) $^ -o $@ $(CFLAGS)
+
+clean:
+	rm -f um
diff --git a/src/um.c b/src/um.c
index f43f675..3106be4 100644
--- a/src/um.c
+++ b/src/um.c
@@ -133,8 +133,6 @@ void run(uint32_t *program) {
       break;
     }
   }
-  free(program);
-  free(arrays);
 }
 
 int main(int argc, char **argv) {