diff --git a/stable-diffusion.h b/stable-diffusion.h
index 9502c4961..d8e49bd78 100644
--- a/stable-diffusion.h
+++ b/stable-diffusion.h
@@ -1,6 +1,7 @@
 #ifndef __STABLE_DIFFUSION_H__
 #define __STABLE_DIFFUSION_H__
 
+#include <string>
 #include <memory>
 #include <vector>