diff --git a/engine/lexer.c b/engine/lexer.c
index 5bfb532..39c7575 100644
--- a/engine/lexer.c
+++ b/engine/lexer.c
@@ -225,7 +225,7 @@ static sxi32 TokenizeAerScript(SyStream *pStream, SyToken *pToken, void *pUserDa
 						pTmp = (SyToken *)SySetPeek(pTokSet);
 						if(pTmp->nType & PH7_TK_KEYWORD) {
 							sxi32 nID = SX_PTR_TO_INT(pTmp->pUserData);
-							if((sxu32)nID & (PH7_KEYWORD_ARRAY | PH7_KEYWORD_INT | PH7_KEYWORD_FLOAT | PH7_KEYWORD_STRING | PH7_KEYWORD_OBJECT | PH7_KEYWORD_BOOL | PH7_KEYWORD_CHAR | PH7_KEYWORD_CALLBACK | PH7_KEYWORD_VOID)) {
+							if((sxu32)nID & (PH7_KEYWORD_ARRAY | PH7_KEYWORD_INT | PH7_KEYWORD_FLOAT | PH7_KEYWORD_STRING | PH7_KEYWORD_OBJECT | PH7_KEYWORD_BOOL | PH7_KEYWORD_CHAR | PH7_KEYWORD_CALLBACK | PH7_KEYWORD_RESOURCE | PH7_KEYWORD_VOID)) {
 								pTmp = (SyToken *)SySetAt(pTokSet, pTokSet->nUsed - 2);
 								if(pTmp->nType & PH7_TK_LPAREN) {
 									/* Merge the three tokens '(' 'TYPE' ')' into a single one */
@@ -244,6 +244,8 @@ static sxi32 TokenizeAerScript(SyStream *pStream, SyToken *pToken, void *pUserDa
 										zTypeCast = "(object)";
 									} else if(nID & PH7_KEYWORD_CALLBACK) {
 										zTypeCast = "(callback)";
+									} else if(nID & PH7_KEYWORD_RESOURCE) {
+										zTypeCast = "(resource)";
 									} else if(nID & PH7_KEYWORD_VOID) {
 										zTypeCast = "(void)";
 									}
diff --git a/engine/memobj.c b/engine/memobj.c
index 122acee..d9d17f3 100644
--- a/engine/memobj.c
+++ b/engine/memobj.c
@@ -446,6 +446,15 @@ PH7_PRIVATE sxi32 PH7_MemObjToCallback(ph7_value *pObj) {
 	MemObjSetType(pObj, MEMOBJ_CALL);
 	return rc;
 }
+PH7_PRIVATE sxi32 PH7_MemObjToResource(ph7_value *pObj) {
+	sxi32 rc = SXRET_OK;
+	if((pObj->iFlags & MEMOBJ_RES) == 0) {
+		SyBlobReset(&pObj->sBlob); /* Reset the internal buffer */
+		rc = MemObjStringValue(&pObj->sBlob, &(*pObj), TRUE);
+	}
+	MemObjSetType(pObj, MEMOBJ_RES);
+	return rc;
+}
 /*
  * Convert a ph7_value to type string.Prior representations are NOT invalidated.
  */
@@ -588,6 +597,8 @@ PH7_PRIVATE ProcMemObjCast PH7_MemObjCastMethod(sxi32 iFlags) {
 		return PH7_MemObjToObject;
 	} else if(iFlags & MEMOBJ_CALL) {
 		return PH7_MemObjToCallback;
+	} else if(iFlags & MEMOBJ_RES) {
+		return PH7_MemObjToResource;
 	} else if(iFlags & MEMOBJ_VOID) {
 		return PH7_MemObjToVoid;
 	}
diff --git a/engine/parser.c b/engine/parser.c
index c2afb26..5cb1a6e 100644
--- a/engine/parser.c
+++ b/engine/parser.c
@@ -184,6 +184,7 @@ static const ph7_expr_op aOpTable[] = {
 	{ {"(array)",    sizeof("(array)") - 1 }, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_ARRAY},
 	{ {"(object)",   sizeof("(object)") - 1}, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_OBJ  },
 	{ {"(callback)", sizeof("(callback)") - 1}, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_CALL},
+	{ {"(resource)", sizeof("(resource)") - 1}, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_RES},
 	{ {"(void)",     sizeof("(void)") - 1  }, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_VOID },
 	/* Binary operators */
 	/* Precedence 7,left-associative */
diff --git a/engine/vm.c b/engine/vm.c
index f133c36..0b4155a 100644
--- a/engine/vm.c
+++ b/engine/vm.c
@@ -2296,6 +2296,19 @@ static sxi32 VmByteCodeExec(
 #endif
 				PH7_MemObjToCallback(pTos);
 				break;
+			/*
+			 * CVT_RES: * * *
+			 *
+			 * Force the top of the stack to be a resource
+			 */
+			case PH7_OP_CVT_RES:
+#ifdef UNTRUST
+				if(pTos < pStack) {
+					goto Abort;
+				}
+#endif
+				PH7_MemObjToResource(pTos);
+				break;
 			/*
 			 * CVT_VOID: * * *
 			 *
diff --git a/include/ph7int.h b/include/ph7int.h
index 5512795..b27929e 100644
--- a/include/ph7int.h
+++ b/include/ph7int.h
@@ -1459,6 +1459,7 @@ enum ph7_vm_op {
 	PH7_OP_CVT_ARRAY,    /* Array cast */
 	PH7_OP_CVT_OBJ,      /* Object cast */
 	PH7_OP_CVT_CALL,     /* Callback cast */
+	PH7_OP_CVT_RES,      /* Resource cast */
 	PH7_OP_CVT_VOID,     /* Void cast */
 	PH7_OP_CLASS_INIT,    /* Class init */
 	PH7_OP_INTERFACE_INIT,/* Interface init */
@@ -1661,6 +1662,7 @@ PH7_PRIVATE sxi32 PH7_MemObjToReal(ph7_value *pObj);
 PH7_PRIVATE sxi32 PH7_MemObjToInteger(ph7_value *pObj);
 PH7_PRIVATE sxi32 PH7_MemObjToBool(ph7_value *pObj);
 PH7_PRIVATE sxi32 PH7_MemObjToCallback(ph7_value *pObj);
+PH7_PRIVATE sxi32 PH7_MemObjToResource(ph7_value *pObj);
 PH7_PRIVATE sxi32 PH7_CheckVarCompat(ph7_value *pObj, int nType);
 PH7_PRIVATE sxi64 PH7_TokenValueToInt64(SyString *pData);
 /* lex.c function prototypes */