diff --git a/src/gallium/drivers/r300/r300_emit.c b/src/gallium/drivers/r300/r300_emit.c
index 53e7f25df3a..167e3c09ca8 100644
--- a/src/gallium/drivers/r300/r300_emit.c
+++ b/src/gallium/drivers/r300/r300_emit.c
@@ -178,7 +178,7 @@ void r300_emit_fs_constants(struct r300_context* r300, unsigned size, void *stat
         return;
 
     BEGIN_CS(size);
-    OUT_CS_REG_SEQ(R300_PFS_PARAM_0_X, count);
+    OUT_CS_REG_SEQ(R300_PFS_PARAM_0_X, count * 4);
     for (i = 0; i < count; i++)
         for (j = 0; j < 4; j++)
             OUT_CS(pack_float24(buf->ptr[i*4+j]));