diff --git a/LEGO1/omni/src/video/mxdisplaysurface.cpp b/LEGO1/omni/src/video/mxdisplaysurface.cpp
index a6295ef6..685c59be 100644
--- a/LEGO1/omni/src/video/mxdisplaysurface.cpp
+++ b/LEGO1/omni/src/video/mxdisplaysurface.cpp
@@ -13,7 +13,7 @@
 
 DECOMP_SIZE_ASSERT(MxDisplaySurface, 0xac);
 
-#define RGB555_CREATE(R, G, B) (((R) << 10) | (G) << 5 || (B) << 0)
+#define RGB555_CREATE(R, G, B) (((R) << 10) | (G) << 5 | (B) << 0)
 
 // GLOBAL: LEGO1 0x1010215c
 MxU32 g_unk0x1010215c = 0;