--- a/ecos_bb/ecos_bb.c
+++ b/ecos_bb/ecos_bb.c
@@ -31,6 +31,7 @@
 #include "math.h"
 #include "equil.h"
 #include "spla.h"
+#include <string.h>
 
 #define MIN(X, Y) ((X) < (Y) ? (X) : (Y))