diff --git a/mace/kernels/opencl/cl/activation.cl b/mace/kernels/opencl/cl/activation.cl
index 02ebff0aaeeb6a416f79b14203896ea40b512fe7..fe8619e20b7f567bc36dfa4bc5d6c53bd5f792fb 100644
--- a/mace/kernels/opencl/cl/activation.cl
+++ b/mace/kernels/opencl/cl/activation.cl
@@ -1,8 +1,8 @@
 #include <common.h>
 
 __kernel void activation(__read_only image2d_t input,
-                         __private const DATA_TYPE relux_max_limit,
-                         __private const DATA_TYPE prelu_alpha,
+                         __private const float relux_max_limit,
+                         __private const float prelu_alpha,
                          __write_only image2d_t output) {
   const int ch_blk = get_global_id(0);
   const int w = get_global_id(1);