diff --git a/PC/_winreg.c b/PC/_winreg.c
index b39411a..782761b 100644
--- a/PC/_winreg.c
+++ b/PC/_winreg.c
@@ -699,7 +699,7 @@
 		case REG_DWORD:
 			if (value != Py_None && !PyInt_Check(value))
 				return FALSE;
-			*retDataBuf = (BYTE *)PyMem_NEW(DWORD, sizeof(DWORD));
+			*retDataBuf = (BYTE *)PyMem_NEW(DWORD, 1);
 			if (*retDataBuf==NULL){
 				PyErr_NoMemory();
 				return FALSE;