diff --git a/Makefile b/Makefile
index 91c58bab0..4443718c8 100644
--- a/Makefile
+++ b/Makefile
@@ -176,7 +176,7 @@ ifeq ($(OS), Haiku)
 CXXFLAGS += -D_DEFAULT_SOURCE
 endif
 
-YOSYS_VER := 0.54+1
+YOSYS_VER := 0.54+15
 YOSYS_MAJOR := $(shell echo $(YOSYS_VER) | cut -d'.' -f1)
 YOSYS_MINOR := $(shell echo $(YOSYS_VER) | cut -d'.' -f2)
 YOSYS_COMMIT := $(shell echo $(YOSYS_VER) | cut -d'.' -f3)
diff --git a/kernel/driver.cc b/kernel/driver.cc
index 9acc58dc4..76c11853e 100644
--- a/kernel/driver.cc
+++ b/kernel/driver.cc
@@ -20,6 +20,7 @@
 #include "kernel/yosys.h"
 #include "kernel/hashlib.h"
 #include "libs/sha1/sha1.h"
+#define CXXOPTS_VECTOR_DELIMITER '\0'
 #include "libs/cxxopts/include/cxxopts.hpp"
 #include <iostream>