diff --git a/CUDACore/src/library_types.jl b/CUDACore/src/library_types.jl
index faa1a9294b..e87777abe9 100644
--- a/CUDACore/src/library_types.jl
+++ b/CUDACore/src/library_types.jl
@@ -33,8 +33,16 @@ end
     C_64I  = 25 # complex as a pair of signed 64-bit int numbers
     R_64U  = 26 # real as a unsigned 64-bit int
     C_64U  = 27 # complex as a pair of unsigned 64-bit int numbers
+    R_8F_E4M3  = 28 # real as a nv_fp8_e4m3
+    R_8F_E5M2  = 29 # real as a nv_fp8_e5m2
+    R_8F_UE8M0 = 30 # real as an exponent-only unsigned nv_fp8_e8m0
+    R_6F_E2M3  = 31 # real as a nv_fp6_e2m3
+    R_6F_E3M2  = 32 # real as a nv_fp6_e3m2
+    R_4F_E2M1  = 33 # real as a nv_fp4_e2m1
 end
 
+const R_8F_UE4M3 = R_8F_E4M3 # real as an unsigned nv_fp8_e4m3
+
 function Base.convert(::Type{cudaDataType}, T::DataType)
     if T === Float16
         return R_16F
diff --git a/test/core/utils.jl b/test/core/utils.jl
index d4cb11815f..59afc577ca 100644
--- a/test/core/utils.jl
+++ b/test/core/utils.jl
@@ -30,4 +30,10 @@ end
     end
     @test_throws ArgumentError convert(CUDACore.cudaDataType, BigFloat)
     @test_throws ArgumentError Type(CUDACore.R_4I) # adjust once we support 4-bit Ints
+    # narrow-precision floats: enum members exist,
+    # but no Julia type maps to them in CUDACore.
+    for c_type in (CUDACore.R_8F_E4M3, CUDACore.R_8F_E5M2, CUDACore.R_8F_UE8M0,
+                   CUDACore.R_6F_E2M3, CUDACore.R_6F_E3M2, CUDACore.R_4F_E2M1)
+        @test_throws ArgumentError Type(c_type)
+    end
 end