diff --git a/flang/module/cudadevice.f90 b/flang/module/cudadevice.f90
index 6cc18f4cbc18c..03860e200cdd8 100644
--- a/flang/module/cudadevice.f90
+++ b/flang/module/cudadevice.f90
@@ -667,29 +667,29 @@ attributes(device) real(8) function sinpi(x) bind(c,name='__nv_sinpi')
     end function
   end interface
 
-  interface __ull2double_rn
-    attributes(device) double precision function __ull2double_rn(i) bind(c)
+  interface __ull2double_rd
+    attributes(device) double precision function __ull2double_rd(i) bind(c, name='__nv_ull2double_rd')
       !dir$ ignore_tkr (d) i
       integer(8), value :: i
     end function
   end interface
 
-  interface __ull2double_rz
-    attributes(device) double precision function __ull2double_rz(i) bind(c)
+  interface __ull2double_rn
+    attributes(device) double precision function __ull2double_rn(i) bind(c, name='__nv_ull2double_rn')
       !dir$ ignore_tkr (d) i
       integer(8), value :: i
     end function
   end interface
 
   interface __ull2double_ru
-    attributes(device) double precision function __ull2double_ru(i) bind(c)
+    attributes(device) double precision function __ull2double_ru(i) bind(c, name='__nv_ull2double_ru')
       !dir$ ignore_tkr (d) i
       integer(8), value :: i
     end function
   end interface
 
-  interface __ull2double_rd
-    attributes(device) double precision function __ull2double_rd(i) bind(c)
+  interface __ull2double_rz
+    attributes(device) double precision function __ull2double_rz(i) bind(c, name='__nv_ull2double_rz')
       !dir$ ignore_tkr (d) i
       integer(8), value :: i
     end function
diff --git a/flang/test/Lower/CUDA/cuda-device-proc.cuf b/flang/test/Lower/CUDA/cuda-device-proc.cuf
index 7957e8b5b0be0..b146f81030657 100644
--- a/flang/test/Lower/CUDA/cuda-device-proc.cuf
+++ b/flang/test/Lower/CUDA/cuda-device-proc.cuf
@@ -84,6 +84,10 @@ attributes(global) subroutine devsub()
   af = __powf(af, af)
   ad = __dsqrt_rd(ad)
   ad = __dsqrt_ru(ad)
+  ad = __ull2double_rd(al)
+  ad = __ull2double_rn(al)
+  ad = __ull2double_ru(al)
+  ad = __ull2double_rz(al)
   r2 = __float2half_rn(af)
   af = __half2float(r2)
 end
@@ -156,6 +160,10 @@ end
 ! CHECK: %{{.*}} = fir.call @__nv_powf(%{{.*}}, %{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f32, f32) -> f32
 ! CHECK: %{{.*}} = fir.call @__nv_dsqrt_rd(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> f64
 ! CHECK: %{{.*}} = fir.call @__nv_dsqrt_ru(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> f64
+! CHECK: %{{.*}} = fir.call @__nv_ull2double_rd(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (i64) -> f64
+! CHECK: %{{.*}} = fir.call @__nv_ull2double_rn(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (i64) -> f64
+! CHECK: %{{.*}} = fir.call @__nv_ull2double_ru(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (i64) -> f64
+! CHECK: %{{.*}} = fir.call @__nv_ull2double_rz(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (i64) -> f64
 ! CHECK: %{{.*}} = fir.call @__nv_float2half_rn(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f32) -> f16
 ! CHECK: %{{.*}} = fir.call @__nv_half2float(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f16) -> f32