diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index 5f42964ad78..a0cb5bbdf9e 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -938,7 +938,7 @@ void draw_primitive(struct wined3d_device *device, UINT start_idx, UINT index_co
         UINT start_instance, UINT instance_count, BOOL indexed) DECLSPEC_HIDDEN;
 DWORD get_flexible_vertex_size(DWORD d3dvtVertexType) DECLSPEC_HIDDEN;
 
-#define eps 1e-8
+#define eps 1e-8f
 
 #define GET_TEXCOORD_SIZE_FROM_FVF(d3dvtVertexType, tex_num) \
     (((((d3dvtVertexType) >> (16 + (2 * (tex_num)))) + 1) & 0x03) + 1)