diff --git a/src/tech/v3/datatype/array_buffer.clj b/src/tech/v3/datatype/array_buffer.clj
index d9999bd8..784b6e3a 100644
--- a/src/tech/v3/datatype/array_buffer.clj
+++ b/src/tech/v3/datatype/array_buffer.clj
@@ -240,7 +240,7 @@
         :int64 (Arrays/fill ^longs ary-data offset end-offset (unchecked-long value))
         :float32 (Arrays/fill ^floats ary-data offset
                               end-offset (unchecked-float value))
-        :float64 (Arrays/fill ^longs ary-data offset end-offset (unchecked-long value))
+        :float64 (Arrays/fill ^doubles ary-data offset end-offset (unchecked-double value))
         (Arrays/fill ^"[Ljava.lang.Object;" ary-data  offset end-offset value))))
   dtype-proto/PClone
   (clone [this]
diff --git a/test/tech/v3/datatype_test.clj b/test/tech/v3/datatype_test.clj
index 1c142197..9ebaaa5d 100644
--- a/test/tech/v3/datatype_test.clj
+++ b/test/tech/v3/datatype_test.clj
@@ -717,3 +717,18 @@
 
 (deftest ->reader-bad-dtype
   (is (thrown? Throwable (dtype/->reader [1 2 3] :foo))))
+
+
+(deftest set-constant-all-numeric-dtypes
+  (let [dtypes [:int8 :uint8
+                :int16 :uin16
+                :int32 :uint32
+                :int64 :uint64
+                :float32 :float64]
+        containers [:jvm-heap :native-heap]]
+    (for [dtype dtypes
+          container containers]
+      (let [data (dtype/make-container container dtype 10)]
+        (dtype/set-constant! data 1)
+        (is (= (mapv long (dtype/->reader data))
+               (vec (repeat 10 1))))))))