diff --git a/libs/vkd3d-shader/ir.c b/libs/vkd3d-shader/ir.c
index c8cbf1e4..03813656 100644
--- a/libs/vkd3d-shader/ir.c
+++ b/libs/vkd3d-shader/ir.c
@@ -1498,6 +1498,10 @@ static void vsir_validate_register(struct validation_context *ctx,
     if (reg->type >= VKD3DSPR_COUNT)
         validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_REGISTER_TYPE, "Invalid register type %#x.",
                 reg->type);
+
+    if (reg->precision >= VKD3D_SHADER_REGISTER_PRECISION_COUNT)
+        validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_PRECISION, "Invalid register precision %#x.",
+                reg->precision);
 }
 
 static void vsir_validate_dst_param(struct validation_context *ctx,
diff --git a/libs/vkd3d-shader/vkd3d_shader_private.h b/libs/vkd3d-shader/vkd3d_shader_private.h
index 7a921578..6bb0882e 100644
--- a/libs/vkd3d-shader/vkd3d_shader_private.h
+++ b/libs/vkd3d-shader/vkd3d_shader_private.h
@@ -200,6 +200,7 @@ enum vkd3d_shader_error
     VKD3D_SHADER_ERROR_VSIR_INVALID_MODIFIERS           = 9004,
     VKD3D_SHADER_ERROR_VSIR_INVALID_SHIFT               = 9005,
     VKD3D_SHADER_ERROR_VSIR_INVALID_SWIZZLE             = 9006,
+    VKD3D_SHADER_ERROR_VSIR_INVALID_PRECISION           = 9007,
 };
 
 enum vkd3d_shader_opcode
@@ -556,6 +557,8 @@ enum vkd3d_shader_register_precision
     VKD3D_SHADER_REGISTER_PRECISION_MIN_INT_16,
     VKD3D_SHADER_REGISTER_PRECISION_MIN_UINT_16,
 
+    VKD3D_SHADER_REGISTER_PRECISION_COUNT,
+
     VKD3D_SHADER_REGISTER_PRECISION_INVALID = ~0u,
 };