diff --git a/src/external/libCuba/src/common/stddecl.h b/src/external/libCuba/src/common/stddecl.h
index 7164fd4c..9ae4a0ad 100644
--- a/src/external/libCuba/src/common/stddecl.h
+++ b/src/external/libCuba/src/common/stddecl.h
@@ -16,6 +16,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdbool.h>
 #include <string.h>
 #include <math.h>
 #include <float.h>