diff --git a/dlls/d3drm/tests/d3drm.c b/dlls/d3drm/tests/d3drm.c
index 88f3db819df..dbba859215b 100644
--- a/dlls/d3drm/tests/d3drm.c
+++ b/dlls/d3drm/tests/d3drm.c
@@ -2157,6 +2157,10 @@ static void test_Viewport(void)
     ok(hr == D3DRMERR_BADVALUE, "Expected hr == D3DRMERR_BADVALUE, got %#x.\n", hr);
     hr = IDirect3DRMViewport_GetDirect3DViewport(viewport, NULL);
     ok(hr == D3DRMERR_BADVALUE, "Expected hr == D3DRMERR_BADVALUE, got %#x.\n", hr);
+    hr = IDirect3DRMViewport_SetField(viewport, 0.0f);
+    ok(hr == D3DRMERR_BADVALUE, "Expected hr == D3DRMERR_BADVALUE, got %#x.\n", hr);
+    hr = IDirect3DRMViewport_SetField(viewport, -1.0f);
+    ok(hr == D3DRMERR_BADVALUE, "Expected hr == D3DRMERR_BADVALUE, got %#x.\n", hr);
 
     IDirect3DRMViewport_Release(viewport);
     ref4 = get_refcount((IUnknown *)d3drm1);
@@ -2249,6 +2253,10 @@ static void test_Viewport(void)
     ok(hr == D3DRMERR_BADVALUE, "Expected hr == D3DRMERR_BADVALUE, got %#x.\n", hr);
     hr = IDirect3DRMViewport2_GetDirect3DViewport(viewport2, NULL);
     ok(hr == D3DRMERR_BADVALUE, "Expected hr == D3DRMERR_BADVALUE, got %#x.\n", hr);
+    hr = IDirect3DRMViewport2_SetField(viewport2, 0.0f);
+    ok(hr == D3DRMERR_BADVALUE, "Expected hr == D3DRMERR_BADVALUE, got %#x.\n", hr);
+    hr = IDirect3DRMViewport2_SetField(viewport2, -1.0f);
+    ok(hr == D3DRMERR_BADVALUE, "Expected hr == D3DRMERR_BADVALUE, got %#x.\n", hr);
 
     IDirect3DRMViewport2_Release(viewport2);
     ref4 = get_refcount((IUnknown *)d3drm1);
diff --git a/dlls/d3drm/viewport.c b/dlls/d3drm/viewport.c
index 430c9d470bf..c2fa1897420 100644
--- a/dlls/d3drm/viewport.c
+++ b/dlls/d3drm/viewport.c
@@ -523,6 +523,9 @@ static HRESULT WINAPI d3drm_viewport2_SetField(IDirect3DRMViewport2 *iface, D3DV
 
     TRACE("iface %p, field %.8e.\n", iface, field);
 
+    if (field <= 0.0f)
+        return D3DRMERR_BADVALUE;
+
     viewport->field = field;
 
     return D3DRM_OK;