diff --git a/src/org/geometerplus/android/fbreader/DictionaryUtil.java b/src/org/geometerplus/android/fbreader/DictionaryUtil.java
index 581b9e658..6b66b8f06 100644
--- a/src/org/geometerplus/android/fbreader/DictionaryUtil.java
+++ b/src/org/geometerplus/android/fbreader/DictionaryUtil.java
@@ -96,7 +96,7 @@ public abstract class DictionaryUtil {
 		for (Map.Entry<PackageInfo,Boolean> entry : infos().entrySet()) {
 			final PackageInfo info = entry.getKey();
 			if (!entry.getValue() ||
-				PackageUtil.canBeStarted(context, getDictionaryIntent(info, "test"))) {
+				PackageUtil.canBeStarted(context, getDictionaryIntent(info, "test"), false)) {
 				list.add(info);
 			}
 		}
@@ -188,7 +188,7 @@ public abstract class DictionaryUtil {
 	}
 
 	public static void installDictionaryIfNotInstalled(final Activity activity) {
-		if (PackageUtil.canBeStarted(activity, getDictionaryIntent("test"))) {
+		if (PackageUtil.canBeStarted(activity, getDictionaryIntent("test"), false)) {
 			return;
 		}
 		final PackageInfo dictionaryInfo = getCurrentDictionaryInfo();
diff --git a/src/org/geometerplus/android/fbreader/network/Util.java b/src/org/geometerplus/android/fbreader/network/Util.java
index fb0178a5b..ab77a69f0 100644
--- a/src/org/geometerplus/android/fbreader/network/Util.java
+++ b/src/org/geometerplus/android/fbreader/network/Util.java
@@ -42,7 +42,7 @@ abstract class Util implements UserRegistrationConstants {
 		"android.fbreader.action.NETWORK_LIBRARY_SMS_REFILLING";
 
 	private static boolean testService(Activity activity, String action, String url) {
-		return url != null && PackageUtil.canBeStarted(activity, new Intent(action, Uri.parse(url)));
+		return url != null && PackageUtil.canBeStarted(activity, new Intent(action, Uri.parse(url)), true);
 	}
 
 	static boolean isRegistrationSupported(Activity activity, INetworkLink link) {
@@ -59,7 +59,7 @@ abstract class Util implements UserRegistrationConstants {
 				REGISTRATION_ACTION,
 				Uri.parse(link.getUrlInfo(INetworkLink.URL_SIGN_UP).URL)
 			);
-			if (PackageUtil.canBeStarted(activity, intent)) {
+			if (PackageUtil.canBeStarted(activity, intent, true)) {
 				activity.startActivityForResult(new Intent(
 					REGISTRATION_ACTION,
 					Uri.parse(link.getUrlInfo(INetworkLink.URL_SIGN_UP).URL)
@@ -109,7 +109,7 @@ abstract class Util implements UserRegistrationConstants {
 					intent.putExtra(entry.getKey(), entry.getValue());
 				}
 			}
-			if (PackageUtil.canBeStarted(activity, intent)) {
+			if (PackageUtil.canBeStarted(activity, intent, true)) {
 				activity.startActivity(intent);
 			}
 		} catch (ActivityNotFoundException e) {
diff --git a/src/org/geometerplus/android/util/PackageUtil.java b/src/org/geometerplus/android/util/PackageUtil.java
index 138c1d0a1..6dff7c844 100644
--- a/src/org/geometerplus/android/util/PackageUtil.java
+++ b/src/org/geometerplus/android/util/PackageUtil.java
@@ -54,18 +54,20 @@ public abstract class PackageUtil {
 	public static boolean isPluginInstalled(Activity activity, String pkg) {
 		return canBeStarted(
 			activity,
-			new Intent("android.fbreader.action.TEST", homeUri(pkg))
+			new Intent("android.fbreader.action.TEST", homeUri(pkg)),
+			true
 		);
 	}
 
 	public static boolean isPluginInstalled(Activity activity, String pkg, String version) {
 		return canBeStarted(
 			activity,
-			new Intent("android.fbreader.action.TEST", homeUri(pkg, version))
+			new Intent("android.fbreader.action.TEST", homeUri(pkg, version)),
+			true
 		);
 	}
 
-	public static boolean canBeStarted(Context context, Intent intent) {
+	public static boolean canBeStarted(Context context, Intent intent, boolean checkSignature) {
 		final PackageManager manager = context.getApplicationContext().getPackageManager();
 		final ResolveInfo info =
 			manager.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
@@ -76,6 +78,9 @@ public abstract class PackageUtil {
 		if (activityInfo == null) {
 			return false;
 		}
+		if (!checkSignature) {
+			return true;
+		}
 		return
 			PackageManager.SIGNATURE_MATCH ==
 			manager.checkSignatures(context.getPackageName(), activityInfo.packageName);