diff --git a/src/core/ev.c b/src/core/ev.c
index 28585d9f..17fe442e 100644
--- a/src/core/ev.c
+++ b/src/core/ev.c
@@ -401,7 +401,7 @@ static void janet_stream_marshal(void *p, JanetMarshalContext *ctx) {
     }
     janet_marshal_abstract(ctx, p);
     janet_marshal_int(ctx, (int32_t) s->flags);
-    janet_marshal_int64(ctx, (intptr_t) s->methods);
+    janet_marshal_ptr(ctx, s->methods);
 #ifdef JANET_WINDOWS
     /* TODO - ref counting to avoid situation where a handle is closed or GCed
      * while in transit, and it's value gets reused. DuplicateHandle does not work
@@ -438,7 +438,7 @@ static void *janet_stream_unmarshal(JanetMarshalContext *ctx) {
     p->_mask = 0;
     p->state = NULL;
     p->flags = (uint32_t) janet_unmarshal_int(ctx);
-    p->methods = (void *) janet_unmarshal_int64(ctx);
+    p->methods =  janet_unmarshal_ptr(ctx);
 #ifdef JANET_WINDOWS
     p->handle = (JanetHandle) janet_unmarshal_int64(ctx);
 #else
diff --git a/src/core/marsh.c b/src/core/marsh.c
index becab902..7e3e1db7 100644
--- a/src/core/marsh.c
+++ b/src/core/marsh.c
@@ -362,6 +362,15 @@ void janet_marshal_int(JanetMarshalContext *ctx, int32_t value) {
     pushint(st, value);
 }
 
+/* Only use in unsafe - don't marshal pointers otherwise */
+void janet_marshal_ptr(JanetMarshalContext *ctx, const void *ptr) {
+    if (sizeof(ptr) == sizeof(int64_t)) {
+        janet_marshal_int64(ctx, (intptr_t) ptr);
+    } else {
+        janet_marshal_int(ctx, (intptr_t) ptr);
+    }
+}
+
 void janet_marshal_byte(JanetMarshalContext *ctx, uint8_t value) {
     MarshalState *st = (MarshalState *)(ctx->m_state);
     pushbyte(st, value);
@@ -1165,6 +1174,15 @@ int64_t janet_unmarshal_int64(JanetMarshalContext *ctx) {
     return read64(st, &(ctx->data));
 }
 
+void *janet_unmarshal_ptr(JanetMarshalContext *ctx) {
+    UnmarshalState *st = (UnmarshalState *)(ctx->u_state);
+    if (sizeof(int64_t) == sizeof(void *)) {
+        return (void *) ((intptr_t) read64(st, &(ctx->data)));
+    } else {
+        return (void *) ((intptr_t) readint(st, &(ctx->data)));
+    }
+}
+
 uint8_t janet_unmarshal_byte(JanetMarshalContext *ctx) {
     UnmarshalState *st = (UnmarshalState *)(ctx->u_state);
     MARSH_EOS(st, ctx->data);
diff --git a/src/include/janet.h b/src/include/janet.h
index 3f6b8982..34cfa06a 100644
--- a/src/include/janet.h
+++ b/src/include/janet.h
@@ -2053,6 +2053,7 @@ JANET_API int janet_cryptorand(uint8_t *out, size_t n);
 JANET_API void janet_marshal_size(JanetMarshalContext *ctx, size_t value);
 JANET_API void janet_marshal_int(JanetMarshalContext *ctx, int32_t value);
 JANET_API void janet_marshal_int64(JanetMarshalContext *ctx, int64_t value);
+JANET_API void janet_marshal_ptr(JanetMarshalContext *ctx, const void *value);
 JANET_API void janet_marshal_byte(JanetMarshalContext *ctx, uint8_t value);
 JANET_API void janet_marshal_bytes(JanetMarshalContext *ctx, const uint8_t *bytes, size_t len);
 JANET_API void janet_marshal_janet(JanetMarshalContext *ctx, Janet x);
@@ -2062,6 +2063,7 @@ JANET_API void janet_unmarshal_ensure(JanetMarshalContext *ctx, size_t size);
 JANET_API size_t janet_unmarshal_size(JanetMarshalContext *ctx);
 JANET_API int32_t janet_unmarshal_int(JanetMarshalContext *ctx);
 JANET_API int64_t janet_unmarshal_int64(JanetMarshalContext *ctx);
+JANET_API void *janet_unmarshal_ptr(JanetMarshalContext *ctx);
 JANET_API uint8_t janet_unmarshal_byte(JanetMarshalContext *ctx);
 JANET_API void janet_unmarshal_bytes(JanetMarshalContext *ctx, uint8_t *dest, size_t len);
 JANET_API Janet janet_unmarshal_janet(JanetMarshalContext *ctx);