diff --git a/src/rusage.c b/src/rusage.c
index 83d90ba55e0ebda15e65911ed917743572badfd7..5689aff45c75fc62c62907c9dc757be111b6c705 100644
--- a/src/rusage.c
+++ b/src/rusage.c
@@ -16,6 +16,9 @@
 #ifdef HAVE_SYS_TIMES_H
 #include <sys/times.h>
 #endif
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
 
 static INT32 rusage_values[30];
 /*