diff --git a/engine/compiler.c b/engine/compiler.c
index 08b296e..b4340ff 100644
--- a/engine/compiler.c
+++ b/engine/compiler.c
@@ -3215,7 +3215,7 @@ loop:
 	}
 	pGen->pIn++; /* Jump the equal sign */
 	/* Allocate a new class attribute */
-	pCons = PH7_NewClassAttr(pGen->pVm, &pClass->sName, pName, nLine, iProtection, iFlags, 0);
+	pCons = PH7_NewClassAttr(pGen->pVm, pClass, pName, nLine, iProtection, iFlags, 0);
 	if(pCons == 0) {
 		PH7_GenCompileError(pGen, E_ERROR, nLine, "PH7 is running out-of-memory");
 	}
@@ -3308,7 +3308,7 @@ loop:
 		PH7_GenCompileError(pGen, E_ERROR, nLine, "Expected '=' or ';' after attribute name '%z'", pName);
 	}
 	/* Allocate a new class attribute */
-	pAttr = PH7_NewClassAttr(pGen->pVm, &pClass->sName, pName, nLine, iProtection, iFlags, nType);
+	pAttr = PH7_NewClassAttr(pGen->pVm, pClass, pName, nLine, iProtection, iFlags, nType);
 	if(pAttr == 0) {
 		PH7_GenCompileError(pGen, E_ERROR, nLine, "PH7 engine is running out-of-memory");
 	}
diff --git a/engine/oop.c b/engine/oop.c
index 51f16fa..b265853 100644
--- a/engine/oop.c
+++ b/engine/oop.c
@@ -67,7 +67,7 @@ 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 *pClass, const SyString *pName, sxu32 nLine, sxi32 iProtection, sxi32 iFlags, sxu32 nType) {
+PH7_PRIVATE ph7_class_attr *PH7_NewClassAttr(ph7_vm *pVm, ph7_class *pClass, 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));
@@ -83,14 +83,8 @@ PH7_PRIVATE ph7_class_attr *PH7_NewClassAttr(ph7_vm *pVm, const SyString *pClass
 		return 0;
 	}
 	SyStringInitFromBuf(&pAttr->sName, zName, pName->nByte);
-	/* Duplicate class name */
-	zName = SyMemBackendStrDup(&pVm->sAllocator, pClass->zString, pClass->nByte);
-	if(zName == 0) {
-		SyMemBackendPoolFree(&pVm->sAllocator, pAttr);
-		return 0;
-	}
-	SyStringInitFromBuf(&pAttr->sClass, zName, pName->nByte);
 	/* Initialize fields */
+	pAttr->pClass = pClass;
 	SySetInit(&pAttr->aByteCode, &pVm->sAllocator, sizeof(VmInstr));
 	pAttr->iProtection = iProtection;
 	pAttr->nIdx = SXU32_HIGH;
diff --git a/include/ph7int.h b/include/ph7int.h
index 04e9a1c..e6db928 100644
--- a/include/ph7int.h
+++ b/include/ph7int.h
@@ -1066,8 +1066,8 @@ struct ph7_class {
  * in an instance of the following structure.
  */
 struct ph7_class_attr {
-	SyString sClass;     /* Class name */
 	SyString sName;      /* Attribute name */
+	ph7_class *pClass;   /* Class, the attribute was declared */
 	sxi32 iFlags;        /* Attribute configuration [i.e: static, variable, constant, etc.] */
 	sxi32 iProtection;   /* Protection level [i.e: public, private, protected] */
 	SySet aByteCode;     /* Compiled attribute body */
@@ -1757,7 +1757,7 @@ 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 *pClass, const SyString *pName, sxu32 nLine, sxi32 iProtection, sxi32 iFlags, sxu32 nType);
+PH7_PRIVATE ph7_class_attr *PH7_NewClassAttr(ph7_vm *pVm, ph7_class *pClass, 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);