diff --git a/src/ShortStrings.jl b/src/ShortStrings.jl
index 6666308..8eb1bb9 100644
--- a/src/ShortStrings.jl
+++ b/src/ShortStrings.jl
@@ -9,15 +9,17 @@ export @ss_str, @ss3_str, @ss7_str, @ss15_str, @ss31_str, @ss63_str, @ss127_str,
 
 include("base.jl")
 
-using MurmurHash3: mmhash128_a, mmhash32
+if isdefined(Base, :memhash)
+    using MurmurHash3: mmhash128_a, mmhash32
 
-function Base.hash(x::ShortString, h::UInt)
-    h += Base.memhash_seed
-@static if UInt === UInt64
-    last(mmhash128_a(sizeof(x), bswap(x.size_content), h%UInt32)) + h
-else
-    mmhash32(sizeof(x), bswap(x.size_content), h%UInt32) + h
-end
+    function Base.hash(x::ShortString, h::UInt)
+        h += Base.memhash_seed
+    @static if UInt === UInt64
+        last(mmhash128_a(sizeof(x), bswap(x.size_content), h%UInt32)) + h
+    else
+        mmhash32(sizeof(x), bswap(x.size_content), h%UInt32) + h
+    end
+    end
 end
 
 end # module
diff --git a/src/hash.jl b/src/hash.jl
deleted file mode 100644
index 7713864..0000000
--- a/src/hash.jl
+++ /dev/null
@@ -1,6 +0,0 @@
-using MurmurHash3: mmhash128_a
-
-function Base.hash(x::ShortString, h::UInt)
-    h += Base.memhash_seed
-    last(mmhash128_a(sizeof(x), bswap(x.size_content), h%UInt32)) + h
-end