diff --git a/Project.toml b/Project.toml
index 3b97c30ab..ee5cf560d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "ChainRulesCore"
 uuid = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"
-version = "1.15.3"
+version = "1.15.4"
 
 [deps]
 Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"
diff --git a/src/tangent_arithmetic.jl b/src/tangent_arithmetic.jl
index 439f0ac8f..9e6b6eb21 100644
--- a/src/tangent_arithmetic.jl
+++ b/src/tangent_arithmetic.jl
@@ -108,8 +108,8 @@ for T in (:AbstractThunk, :Tangent, :Any)
     @eval LinearAlgebra.dot(::$T, ::ZeroTangent) = ZeroTangent()
 end
 
-Base.real(::ZeroTangent) = ZeroTangent()
-Base.imag(::ZeroTangent) = ZeroTangent()
+Base.real(z::AbstractZero) = z
+Base.imag(z::AbstractZero) = z
 
 Base.complex(::ZeroTangent) = ZeroTangent()
 Base.complex(::ZeroTangent, ::ZeroTangent) = ZeroTangent()