diff --git a/src/pike_types.h b/src/pike_types.h
index 6feee0a0259ca538d15b409f25c8e4e83723c87d..3fe06be49599bf0474a82fe707a6d368d76815f6 100644
--- a/src/pike_types.h
+++ b/src/pike_types.h
@@ -8,6 +8,7 @@
 #define PIKE_TYPES_H
 
 #include "svalue.h"
+#include "stralloc.h"
 
 #define PIKE_TYPE_STACK_SIZE 100000