diff --git a/dlls/ddraw/executebuffer.c b/dlls/ddraw/executebuffer.c
index 2f426881cba..129a0b862e5 100644
--- a/dlls/ddraw/executebuffer.c
+++ b/dlls/ddraw/executebuffer.c
@@ -703,7 +703,6 @@ IDirect3DExecuteBufferImpl_Lock(IDirect3DExecuteBuffer *iface,
     TRACE("(%p)->(%p)\n", This, lpDesc);
 
     dwSize = lpDesc->dwSize;
-    memset(lpDesc, 0, dwSize);
     memcpy(lpDesc, &This->desc, dwSize);
 
     if (TRACE_ON(d3d7)) {
@@ -789,7 +788,6 @@ IDirect3DExecuteBufferImpl_GetExecuteData(IDirect3DExecuteBuffer *iface,
     TRACE("(%p)->(%p): stub!\n", This, lpData);
 
     dwSize = lpData->dwSize;
-    memset(lpData, 0, dwSize);
     memcpy(lpData, &This->data, dwSize);
 
     if (TRACE_ON(d3d7)) {
diff --git a/dlls/ddraw/material.c b/dlls/ddraw/material.c
index 6f162f7c828..d75501ecd95 100644
--- a/dlls/ddraw/material.c
+++ b/dlls/ddraw/material.c
@@ -294,7 +294,6 @@ IDirect3DMaterialImpl_GetMaterial(IDirect3DMaterial3 *iface,
     /* Copies the material structure */
     EnterCriticalSection(&ddraw_cs);
     dwSize = lpMat->dwSize;
-    memset(lpMat, 0, dwSize);
     memcpy(lpMat, &This->mat, dwSize);
     LeaveCriticalSection(&ddraw_cs);