diff --git a/engine/compiler.c b/engine/compiler.c
index 5026716..ff6ddf3 100644
--- a/engine/compiler.c
+++ b/engine/compiler.c
@@ -3359,7 +3359,7 @@ loop:
 	}
 	pGen->pIn++; /* Jump the equal sign */
 	/* Allocate a new class attribute */
-	pCons = PH7_NewClassAttr(pGen->pVm, pName, nLine, iProtection, iFlags);
+	pCons = PH7_NewClassAttr(pGen->pVm, pName, nLine, iProtection, iFlags, 0);
 	if(pCons == 0) {
 		PH7_GenCompileError(pGen, E_ERROR, nLine, "Fatal, PH7 is running out of memory");
 		return SXERR_ABORT;
@@ -3438,7 +3438,7 @@ Synchronize:
  *   Refer to the official documentation for more information on the powerful extension
  *   introduced by the PH7 engine to the OO subsystem.
  */
-static sxi32 PH7_GenStateCompileClassAttr(ph7_gen_state *pGen, sxi32 iProtection, sxi32 iFlags, ph7_class *pClass) {
+static sxi32 PH7_GenStateCompileClassAttr(ph7_gen_state *pGen, sxi32 iProtection, sxi32 iFlags, sxu32 nType, ph7_class *pClass) {
 	sxu32 nLine = pGen->pIn->nLine;
 	ph7_class_attr *pAttr;
 	SyString *pName;
@@ -3470,7 +3470,7 @@ loop:
 		goto Synchronize;
 	}
 	/* Allocate a new class attribute */
-	pAttr = PH7_NewClassAttr(pGen->pVm, pName, nLine, iProtection, iFlags);
+	pAttr = PH7_NewClassAttr(pGen->pVm, pName, nLine, iProtection, iFlags, nType);
 	if(pAttr == 0) {
 		PH7_GenCompileError(pGen, E_ERROR, nLine, "Fatal, PH7 engine is running out of memory");
 		return SXERR_ABORT;
@@ -4286,7 +4286,7 @@ static sxi32 PH7_GenStateCompileClass(ph7_gen_state *pGen, sxi32 iFlags) {
 			}
 			if(pGen->pIn->nType & PH7_TK_DOLLAR/*'$'*/) {
 				/* Attribute declaration */
-				rc = PH7_GenStateCompileClassAttr(&(*pGen), iProtection, iAttrflags, pClass);
+				rc = PH7_GenStateCompileClassAttr(&(*pGen), iProtection, iAttrflags, nType, pClass);
 			} else {
 				/* Process method declaration */
 				rc = PH7_GenStateCompileClassMethod(&(*pGen), nType, iProtection, iAttrflags, TRUE, pClass);
diff --git a/engine/oop.c b/engine/oop.c
index bcc7c7c..25693f1 100644
--- a/engine/oop.c
+++ b/engine/oop.c
@@ -75,7 +75,7 @@ PH7_PRIVATE ph7_class *PH7_NewRawClass(ph7_vm *pVm, const SyString *pName) {
  * Allocate and initialize a new class attribute.
  * Return a pointer to the class attribute on success. NULL otherwise.
  */
-PH7_PRIVATE ph7_class_attr *PH7_NewClassAttr(ph7_vm *pVm, const SyString *pName, sxu32 nLine, sxi32 iProtection, sxi32 iFlags) {
+PH7_PRIVATE ph7_class_attr *PH7_NewClassAttr(ph7_vm *pVm, const SyString *pName, sxu32 nLine, sxi32 iProtection, sxi32 iFlags, sxu32 nType) {
 	ph7_class_attr *pAttr;
 	char *zName;
 	pAttr = (ph7_class_attr *)SyMemBackendPoolAlloc(&pVm->sAllocator, sizeof(ph7_class_attr));
@@ -96,6 +96,7 @@ PH7_PRIVATE ph7_class_attr *PH7_NewClassAttr(ph7_vm *pVm, const SyString *pName,
 	pAttr->iProtection = iProtection;
 	pAttr->nIdx = SXU32_HIGH;
 	pAttr->iFlags = iFlags;
+	pAttr->nType = nType;
 	pAttr->nLine = nLine;
 	return pAttr;
 }
diff --git a/engine/vm.c b/engine/vm.c
index 27fc93d..e375f83 100644
--- a/engine/vm.c
+++ b/engine/vm.c
@@ -695,6 +695,7 @@ PH7_PRIVATE sxi32 PH7_VmCreateClassInstanceFrame(
 				SyMemBackendPoolFree(&pVm->sAllocator, pVmAttr);
 				return SXERR_MEM;
 			}
+			MemObjSetType(pMemObj, pAttr->nType);
 			pVmAttr->nIdx = pMemObj->nIdx;
 			if(SySetUsed(&pAttr->aByteCode) > 0) {
 				/* Initialize attribute default value (any complex expression) */
diff --git a/include/compiler.h b/include/compiler.h
index a545ebc..099d227 100644
--- a/include/compiler.h
+++ b/include/compiler.h
@@ -128,7 +128,7 @@ static sxi32 PH7_GenStateCompileFunc(ph7_gen_state *pGen, SyString *pName, sxi32
 static sxi32 PH7_CompileFunction(ph7_gen_state *pGen);
 static sxi32 PH7_GetProtectionLevel(sxi32 nKeyword);
 static sxi32 PH7_GenStateCompileClassConstant(ph7_gen_state *pGen, sxi32 iProtection, sxi32 iFlags, ph7_class *pClass);
-static sxi32 PH7_GenStateCompileClassAttr(ph7_gen_state *pGen, sxi32 iProtection, sxi32 iFlags, ph7_class *pClass);
+static sxi32 PH7_GenStateCompileClassAttr(ph7_gen_state *pGen, sxi32 iProtection, sxi32 iFlags, sxu32 nType, ph7_class *pClass);
 static sxi32 PH7_GenStateCompileClassMethod(ph7_gen_state *pGen, sxu32 nType, sxi32 iProtection, sxi32 iFlags, int doBody, ph7_class *pClass);
 static sxi32 PH7_CompileClassInterface(ph7_gen_state *pGen);
 static sxi32 PH7_GenStateCompileClass(ph7_gen_state *pGen, sxi32 iFlags);
diff --git a/include/ph7int.h b/include/ph7int.h
index 808a986..8baa177 100644
--- a/include/ph7int.h
+++ b/include/ph7int.h
@@ -1075,6 +1075,7 @@ struct ph7_class_attr {
 	sxi32 iFlags;        /* Attribute configuration [i.e: static, variable, constant, etc.] */
 	sxi32 iProtection;   /* Protection level [i.e: public, private, protected] */
 	SySet aByteCode;     /* Compiled attribute body */
+	sxu32 nType;         /* Class attribute data type */
 	sxu32 nIdx;          /* Attribute index */
 	sxu32 nLine;         /* Line number on which this attribute was defined */
 };
@@ -1763,7 +1764,7 @@ PH7_PRIVATE sxi32 PH7_ParseIniString(ph7_context *pCtx, const char *zIn, sxu32 n
 /* oo.c function prototypes */
 PH7_PRIVATE ph7_class_info *PH7_NewClassInfo(ph7_vm *pVm, const SyString *pName);
 PH7_PRIVATE ph7_class *PH7_NewRawClass(ph7_vm *pVm, const SyString *pName);
-PH7_PRIVATE ph7_class_attr *PH7_NewClassAttr(ph7_vm *pVm, const SyString *pName, sxu32 nLine, sxi32 iProtection, sxi32 iFlags);
+PH7_PRIVATE ph7_class_attr *PH7_NewClassAttr(ph7_vm *pVm, const SyString *pName, sxu32 nLine, sxi32 iProtection, sxi32 iFlags, sxu32 nType);
 PH7_PRIVATE ph7_class_method *PH7_NewClassMethod(ph7_vm *pVm, ph7_class *pClass, const SyString *pName, sxu32 nLine,
 		sxi32 iProtection, sxi32 iFlags, sxi32 iFuncFlags);
 PH7_PRIVATE ph7_class_method *PH7_ClassExtractMethod(ph7_class *pClass, const char *zName, sxu32 nByte);