diff --git a/CHANGELOG.adoc b/CHANGELOG.adoc
index babe9b32aa..298a26f3be 100644
--- a/CHANGELOG.adoc
+++ b/CHANGELOG.adoc
@@ -17,12 +17,17 @@
 [cols="1,10,3", options="header", width="100%"]
 |===
 | | Description | PR
-|===
 
 | 🐣
 | Refactor `e2e` common code into `lib/test`
 | https://github.com/knative/client/pull/765[#765]
 
+| 🐛
+| Fix plugin lookup with file ext on Windows
+| https://github.com/knative/client/pull/774[#774]
+
+|===
+
 ## v0.13.1 (2020-03-25)
 
 [cols="1,10,3", options="header", width="100%"]
diff --git a/pkg/kn/commands/plugin/handler.go b/pkg/kn/commands/plugin/handler.go
index 7ee7c4eeb5..5f8b86a065 100644
--- a/pkg/kn/commands/plugin/handler.go
+++ b/pkg/kn/commands/plugin/handler.go
@@ -60,6 +60,7 @@ func NewDefaultPluginHandler(validPrefixes []string, pluginsDir string, lookupPl
 }
 
 // Lookup implements PluginHandler
+// TODO: The current error handling is not optimal, and some errors may be lost. We should refactor the code in the future.
 func (h *DefaultPluginHandler) Lookup(name string) (string, bool) {
 	for _, prefix := range h.ValidPrefixes {
 		pluginPath := fmt.Sprintf("%s-%s", prefix, name)
@@ -72,10 +73,21 @@ func (h *DefaultPluginHandler) Lookup(name string) (string, bool) {
 
 		pluginDirPluginPath := filepath.Join(pluginDir, pluginPath)
 		_, err = os.Stat(pluginDirPluginPath)
-		if !os.IsNotExist(err) {
+		if err == nil {
 			return pluginDirPluginPath, true
 		}
 
+		// Try to match well-known file extensions on Windows
+		if runtime.GOOS == "windows" {
+			for _, ext := range []string{".bat", ".cmd", ".com", ".exe", ".ps1"} {
+				pathWithExt := pluginDirPluginPath + ext
+				_, err = os.Stat(pathWithExt)
+				if err == nil {
+					return pathWithExt, true
+				}
+			}
+		}
+
 		// No plugins found in pluginsDir, try in PATH of that's an option
 		if h.LookupPluginsInPath {
 			pluginPath, err = exec.LookPath(pluginPath)