diff --git a/src/setup.h b/src/setup.h
index fb6f4e62f..c7e7cf98e 100644
--- a/src/setup.h
+++ b/src/setup.h
@@ -149,6 +149,10 @@
 #endif
 
 #include <stdio.h>
+#ifdef HAVE_ASSERT_H
+#include <assert.h>
+#endif
+
 
 #ifdef __TANDEM
 #include <floss.h>