diff --git a/projects/clr/hipamd/include/hip/hcc_detail/math_functions.h b/projects/clr/hipamd/include/hip/hcc_detail/math_functions.h
index e7312f32f2..ea3bd97571 100644
--- a/projects/clr/hipamd/include/hip/hcc_detail/math_functions.h
+++ b/projects/clr/hipamd/include/hip/hcc_detail/math_functions.h
@@ -60,6 +60,7 @@ __device__ int abs(int x);
 __device__ long long abs(long long x);
 __device__ double abs(double x);
 __device__ long int abs(long int x);
+__device__ long long int labs(long long int x);
 __device__ float fabsf(float x);
 __device__ float fdimf(float x, float y);
 __device__ float fdividef(float x, float y);