diff --git a/include/ghostty.h b/include/ghostty.h
index 40ff55c9b..3c4002abc 100644
--- a/include/ghostty.h
+++ b/include/ghostty.h
@@ -17,6 +17,11 @@ extern "C" {
 #include <stdint.h>
 #include <sys/types.h>
 
+#ifdef _MSC_VER
+#include <BaseTsd.h>
+typedef SSIZE_T ssize_t;
+#endif
+
 //-------------------------------------------------------------------
 // Macros