diff --git a/executor.go b/executor.go
index 73f7e19d2..ce0707be0 100644
--- a/executor.go
+++ b/executor.go
@@ -770,7 +770,8 @@ func (e *executor) executeSum(ctx context.Context, index string, c *pql.Call, sh
 	span, ctx := tracing.StartSpanFromContext(ctx, "Executor.executeSum")
 	defer span.Finish()
 
-	if field := c.Args["field"]; field == "" {
+	fieldName, ok := c.Args["field"].(string)
+	if !ok || fieldName == "" {
 		return ValCount{}, errors.New("Sum(): field required")
 	}
 
@@ -798,6 +799,21 @@ func (e *executor) executeSum(ctx context.Context, index string, c *pql.Call, sh
 	if other.Count == 0 {
 		return ValCount{}, nil
 	}
+
+	// scale summed response into float if decimal field and this is
+	// not a remote query (we're about to return to original client).
+	if !opt.Remote {
+		field := e.Holder.Field(index, fieldName)
+		if field == nil {
+			return ValCount{}, ErrFieldNotFound
+		}
+		if field.Type() == FieldTypeDecimal {
+			if scale := field.Options().Scale; scale != 0 {
+				other.FloatVal = float64(other.Val) / math.Pow10(int(scale))
+				other.Val = 0
+			}
+		}
+	}
 	return other, nil
 }
 
diff --git a/server/server_test.go b/server/server_test.go
index 457ab7451..5225e7a05 100644
--- a/server/server_test.go
+++ b/server/server_test.go
@@ -1019,3 +1019,45 @@ func TestClusterExhaustingConnectionsImport(t *testing.T) {
 		t.Fatalf("setting lots of shards: %v", err)
 	}
 }
+
+func TestClusterMinMaxSumDecimal(t *testing.T) {
+	cluster := test.MustRunCluster(t, 3)
+	defer cluster.Close()
+	cmd := cluster[0]
+
+	cmd.MustCreateIndex(t, "testdec", pilosa.IndexOptions{Keys: true, TrackExistence: true})
+	cmd.MustCreateField(t, "testdec", "adec", pilosa.OptFieldTypeDecimal(2))
+
+	test.MustDo("POST", cluster[0].URL()+"/index/testdec/query", `
+Set("a", adec=42.2)
+Set("b", adec=11.12)
+Set("c", adec=13.41)
+Set("d", adec=99.87)
+Set("e", adec=11.13)
+Set("f", adec=12.12)
+Set("g", adec=15.52)
+Set("h", adec=100.22)
+`)
+
+	result := test.MustDo("POST", cluster[0].URL()+"/index/testdec/query", "Sum(field=adec)")
+	if !strings.Contains(result.Body, `"floatValue":305.59`) {
+		t.Fatalf("expected float sum of 305.59, but got: '%s'", result.Body)
+	} else if !strings.Contains(result.Body, `"count":8`) {
+		t.Fatalf("expected count 8, but got: '%s'", result.Body)
+	}
+
+	result = test.MustDo("POST", cluster[0].URL()+"/index/testdec/query", "Max(field=adec)")
+	if !strings.Contains(result.Body, `"floatValue":100.22`) {
+		t.Fatalf("expected float max of 100.22, but got: '%s'", result.Body)
+	} else if !strings.Contains(result.Body, `"count":1`) {
+		t.Fatalf("expected count 1, but got: '%s'", result.Body)
+	}
+
+	result = test.MustDo("POST", cluster[0].URL()+"/index/testdec/query", "Min(field=adec)")
+	if !strings.Contains(result.Body, `"floatValue":11.12`) {
+		t.Fatalf("expected float min of 11.12, but got: '%s'", result.Body)
+	} else if !strings.Contains(result.Body, `"count":1`) {
+		t.Fatalf("expected count 1, but got: '%s'", result.Body)
+	}
+
+}