diff --git a/scripts/install b/scripts/install
index 58a0be9..c70866a 100755
--- a/scripts/install
+++ b/scripts/install
@@ -66,8 +66,16 @@ cp -a "../conf/minetest-preferences" "/etc/apt/preferences.d/00MinetestPinning"
 ynh_replace_string "__CODENAME__" "$codename" "/etc/apt/preferences.d/00MinetestPinning"
 if [ $(uname -m) == "armv7l" ]
 then
-    gpg --keyserver pgpkeys.mit.edu --recv-key 7638D0442B90D010
-    gpg --keyserver pgpkeys.mit.edu --recv-key 8B48AD6246925553
+    gpg --list-keys 7638D0442B90D010 > /dev/null 2>&1
+    if [ $? != 0 ]
+    then
+        gpg --keyserver pgpkeys.mit.edu --recv-key 7638D0442B90D010
+    fi
+    gpg --list-keys 8B48AD6246925553 > /dev/null 2>&1
+    if [ $? != 0 ]
+    then
+        gpg --keyserver pgpkeys.mit.edu --recv-key 8B48AD6246925553
+    fi
     gpg -a --export 7638D0442B90D010 | apt-key add -
     gpg -a --export 8B48AD6246925553 | apt-key add -
 fi