diff --git a/src/gallium/drivers/radeonsi/si_shader.h b/src/gallium/drivers/radeonsi/si_shader.h
index 8fb4b563b78..1eacef63e72 100644
--- a/src/gallium/drivers/radeonsi/si_shader.h
+++ b/src/gallium/drivers/radeonsi/si_shader.h
@@ -157,7 +157,7 @@ struct si_context;
 /* Shader IO unique indices are supported for TGSI_SEMANTIC_GENERIC with an
  * index smaller than this.
  */
-#define SI_MAX_IO_GENERIC       43
+#define SI_MAX_IO_GENERIC       32
 
 /* SGPR user data indices */
 enum {