diff --git a/langs/hoax/runtime.h b/langs/hoax/runtime.h
index 813214d6..cf6a73cf 100644
--- a/langs/hoax/runtime.h
+++ b/langs/hoax/runtime.h
@@ -3,7 +3,7 @@
 
 #include "values.h"
 
-val_t entry();
+val_t entry(val_t*);
 extern FILE* in;
 extern FILE* out;
 extern void (*error_handler)();
diff --git a/langs/hustle/runtime.h b/langs/hustle/runtime.h
index 813214d6..cf6a73cf 100644
--- a/langs/hustle/runtime.h
+++ b/langs/hustle/runtime.h
@@ -3,7 +3,7 @@
 
 #include "values.h"
 
-val_t entry();
+val_t entry(val_t*);
 extern FILE* in;
 extern FILE* out;
 extern void (*error_handler)();
diff --git a/langs/iniquity/runtime.h b/langs/iniquity/runtime.h
index f594f0f6..cf6a73cf 100644
--- a/langs/iniquity/runtime.h
+++ b/langs/iniquity/runtime.h
@@ -1,11 +1,15 @@
 #ifndef RUNTIME_H
 #define RUNTIME_H
-int64_t entry();
+
+#include "values.h"
+
+val_t entry(val_t*);
 extern FILE* in;
 extern FILE* out;
 extern void (*error_handler)();
 
 // in words
 #define heap_size 10000
-extern int64_t *heap;
+extern val_t *heap;
+
 #endif /* RUNTIME_H */
diff --git a/langs/jig/runtime.h b/langs/jig/runtime.h
index f594f0f6..cf6a73cf 100644
--- a/langs/jig/runtime.h
+++ b/langs/jig/runtime.h
@@ -1,11 +1,15 @@
 #ifndef RUNTIME_H
 #define RUNTIME_H
-int64_t entry();
+
+#include "values.h"
+
+val_t entry(val_t*);
 extern FILE* in;
 extern FILE* out;
 extern void (*error_handler)();
 
 // in words
 #define heap_size 10000
-extern int64_t *heap;
+extern val_t *heap;
+
 #endif /* RUNTIME_H */
diff --git a/langs/knock/runtime.h b/langs/knock/runtime.h
index f594f0f6..cf6a73cf 100644
--- a/langs/knock/runtime.h
+++ b/langs/knock/runtime.h
@@ -1,11 +1,15 @@
 #ifndef RUNTIME_H
 #define RUNTIME_H
-int64_t entry();
+
+#include "values.h"
+
+val_t entry(val_t*);
 extern FILE* in;
 extern FILE* out;
 extern void (*error_handler)();
 
 // in words
 #define heap_size 10000
-extern int64_t *heap;
+extern val_t *heap;
+
 #endif /* RUNTIME_H */
diff --git a/langs/loot/runtime.h b/langs/loot/runtime.h
index f594f0f6..cf6a73cf 100644
--- a/langs/loot/runtime.h
+++ b/langs/loot/runtime.h
@@ -1,11 +1,15 @@
 #ifndef RUNTIME_H
 #define RUNTIME_H
-int64_t entry();
+
+#include "values.h"
+
+val_t entry(val_t*);
 extern FILE* in;
 extern FILE* out;
 extern void (*error_handler)();
 
 // in words
 #define heap_size 10000
-extern int64_t *heap;
+extern val_t *heap;
+
 #endif /* RUNTIME_H */
diff --git a/langs/mountebank/runtime.h b/langs/mountebank/runtime.h
index f594f0f6..cf6a73cf 100644
--- a/langs/mountebank/runtime.h
+++ b/langs/mountebank/runtime.h
@@ -1,11 +1,15 @@
 #ifndef RUNTIME_H
 #define RUNTIME_H
-int64_t entry();
+
+#include "values.h"
+
+val_t entry(val_t*);
 extern FILE* in;
 extern FILE* out;
 extern void (*error_handler)();
 
 // in words
 #define heap_size 10000
-extern int64_t *heap;
+extern val_t *heap;
+
 #endif /* RUNTIME_H */
diff --git a/langs/mug/runtime.h b/langs/mug/runtime.h
index f594f0f6..cf6a73cf 100644
--- a/langs/mug/runtime.h
+++ b/langs/mug/runtime.h
@@ -1,11 +1,15 @@
 #ifndef RUNTIME_H
 #define RUNTIME_H
-int64_t entry();
+
+#include "values.h"
+
+val_t entry(val_t*);
 extern FILE* in;
 extern FILE* out;
 extern void (*error_handler)();
 
 // in words
 #define heap_size 10000
-extern int64_t *heap;
+extern val_t *heap;
+
 #endif /* RUNTIME_H */
diff --git a/langs/neerdowell/runtime.h b/langs/neerdowell/runtime.h
index f594f0f6..cf6a73cf 100644
--- a/langs/neerdowell/runtime.h
+++ b/langs/neerdowell/runtime.h
@@ -1,11 +1,15 @@
 #ifndef RUNTIME_H
 #define RUNTIME_H
-int64_t entry();
+
+#include "values.h"
+
+val_t entry(val_t*);
 extern FILE* in;
 extern FILE* out;
 extern void (*error_handler)();
 
 // in words
 #define heap_size 10000
-extern int64_t *heap;
+extern val_t *heap;
+
 #endif /* RUNTIME_H */