--- a/generator/generator_test_seq.c
+++ b/generator/generator_test_seq.c
@@ -20,7 +20,7 @@
 
 #include "make_graph.h"
 
-inline double get_time() {
+static inline double get_time() {
   struct timeval tv;
   gettimeofday(&tv, NULL);
   return tv.tv_sec + tv.tv_usec * 1.e-6;