diff --git a/src/mesa/swrast/s_span.c b/src/mesa/swrast/s_span.c
index f23272c2bee..cfc65bee87f 100644
--- a/src/mesa/swrast/s_span.c
+++ b/src/mesa/swrast/s_span.c
@@ -1358,7 +1358,7 @@ _swrast_write_rgba_span( GLcontext *ctx, SWspan *span)
 
 #if CHAN_BITS == 32
    if ((span->arrayAttribs & FRAG_BIT_COL0) == 0) {
-      interpolate_int_colors(ctx, span);
+      interpolate_active_attribs(ctx, span, FRAG_BIT_COL0);
    }
 #else
    if ((span->arrayMask & SPAN_RGBA) == 0) {