diff --git a/SPIRV/spvIR.h b/SPIRV/spvIR.h
index 6ea0a0c5..91a434fa 100644
--- a/SPIRV/spvIR.h
+++ b/SPIRV/spvIR.h
@@ -54,6 +54,7 @@
 
 #include <vector>
 #include <iostream>
+#include <cassert>
 
 namespace spv {