diff --git a/src/gallium/auxiliary/util/u_prim.h b/src/gallium/auxiliary/util/u_prim.h
index 070df643d2c..d62c636f2ee 100644
--- a/src/gallium/auxiliary/util/u_prim.h
+++ b/src/gallium/auxiliary/util/u_prim.h
@@ -118,7 +118,9 @@ static INLINE unsigned u_reduced_prim( unsigned pipe_prim )
       return PIPE_PRIM_POINTS;
 
    case PIPE_PRIM_LINES:
+   case PIPE_PRIM_LINES_ADJACENCY:
    case PIPE_PRIM_LINE_STRIP:
+   case PIPE_PRIM_LINE_STRIP_ADJACENCY:
    case PIPE_PRIM_LINE_LOOP:
       return PIPE_PRIM_LINES;