diff --git a/cas/aidl/default/Android.bp b/cas/aidl/default/Android.bp
index 6ce5681..576016e 100644
--- a/cas/aidl/default/Android.bp
+++ b/cas/aidl/default/Android.bp
@@ -21,6 +21,7 @@
 
     shared_libs: [
         "android.hardware.cas-V1-ndk",
+        "libbase",
         "libbinder_ndk",
         "liblog",
         "libutils",
@@ -48,6 +49,7 @@
     ],
     shared_libs: [
         "android.hardware.cas-V1-ndk",
+        "libbase",
         "libbinder_ndk",
         "liblog",
         "libutils",
diff --git a/cas/aidl/default/FactoryLoader.h b/cas/aidl/default/FactoryLoader.h
index 6a562f6..443ea1f 100644
--- a/cas/aidl/default/FactoryLoader.h
+++ b/cas/aidl/default/FactoryLoader.h
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include <android-base/strings.h>
 #include <dirent.h>
 #include <dlfcn.h>
 #include <media/cas/CasAPI.h>
@@ -96,7 +97,7 @@
     struct dirent* pEntry;
     while ((pEntry = readdir(pDir))) {
         String8 pluginPath = dirPath + "/" + pEntry->d_name;
-        if (pluginPath.getPathExtension() == ".so") {
+        if (base::EndsWith(pluginPath.c_str(), ".so")) {
             if (loadFactoryForSchemeFromPath(pluginPath, CA_system_id, library, factory)) {
                 mCASystemIdToLibraryPathMap.add(CA_system_id, pluginPath);
                 closedir(pDir);
@@ -135,7 +136,7 @@
     struct dirent* pEntry;
     while ((pEntry = readdir(pDir))) {
         String8 pluginPath = dirPath + "/" + pEntry->d_name;
-        if (pluginPath.getPathExtension() == ".so") {
+        if (base::EndsWith(pluginPath.c_str(), ".so")) {
             queryPluginsFromPath(pluginPath, results);
         }
     }