diff --git a/cmd/dcrdata/internal/middleware/apimiddleware.go b/cmd/dcrdata/internal/middleware/apimiddleware.go
index dd9f314a4..184635f65 100644
--- a/cmd/dcrdata/internal/middleware/apimiddleware.go
+++ b/cmd/dcrdata/internal/middleware/apimiddleware.go
@@ -1104,7 +1104,7 @@ func RetrieveStickWidthCtx(r *http.Request) string {
 }
 
 // APIVersionCtx adds supported API version to a request context.
-func APIVersionCtx(version string) func(next http.Handler) http.Handler {
+func APIVersionCtx(version int) func(next http.Handler) http.Handler {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			r = r.WithContext(context.WithValue(r.Context(), ctxAPIVersion, version))
@@ -1115,11 +1115,11 @@ func APIVersionCtx(version string) func(next http.Handler) http.Handler {
 
 // RetrieveAPIVersion pulls the API version of this request form the request's
 // context. Unused
-func RetrieveAPIVersion(r *http.Request) string {
-	version, ok := r.Context().Value(ctxAPIVersion).(string)
+func RetrieveAPIVersion(r *http.Request) int {
+	version, ok := r.Context().Value(ctxAPIVersion).(int)
 	if !ok {
 		// The request was sent to the default API route, so no version was set.
-		return ""
+		return 0
 	}
 	return version
 }
diff --git a/cmd/dcrdata/main.go b/cmd/dcrdata/main.go
index 0c522d808..b721d5814 100644
--- a/cmd/dcrdata/main.go
+++ b/cmd/dcrdata/main.go
@@ -731,8 +731,7 @@ func _main(ctx context.Context) error {
 		r.Mount("/api", apiMux.Mux)
 		// Mount versioned dcrdata REST API.
 		for _, version := range apiMux.Versions() {
-			versionStr := fmt.Sprintf("v%d", version)
-			r.With(mw.APIVersionCtx(versionStr)).Mount(fmt.Sprintf("/api/%s", versionStr), apiMux.Mux)
+			r.With(mw.APIVersionCtx(int(version))).Mount(fmt.Sprintf("/api/v%d", version), apiMux.Mux)
 		}
 
 		// Setup the Insight API.
@@ -746,8 +745,7 @@ func _main(ctx context.Context) error {
 		r.Mount("/insight/api", insightMux.Mux)
 		// Mount the versioned insight REST API.
 		for _, version := range insightMux.Versions() {
-			versionStr := fmt.Sprintf("v%d", version)
-			r.With(mw.APIVersionCtx(versionStr)).Mount(fmt.Sprintf("/insight/api/%s", versionStr), insightMux.Mux)
+			r.With(mw.APIVersionCtx(int(version))).Mount(fmt.Sprintf("/insight/api/v%d", version), insightMux.Mux)
 		}
 
 		if insightSocketServer != nil {