diff --git a/build.sh b/build.sh
index 1ef4171..1a9c7e9 100755
--- a/build.sh
+++ b/build.sh
@@ -54,9 +54,11 @@ mkdir build
 cp "$I2P_JARS"/*.jar build
 if [ ! -f "$HERE/build/jna.jar" ]; then
   wget -O "$HERE/build/jna.jar" "https://repo1.maven.org/maven2/net/java/dev/jna/jna/$JNA_VERSION/jna-$JNA_VERSION.jar"
-  wget -O "$HERE/build/jna-platform.jar" "https://repo1.maven.org/maven2/net/java/dev/jna/jna-platform/$JNA_VERSION/jna-platform-$JNA_VERSION.jar"
 fi
 
+if [ ! -f "$HERE/build/jna-platform.jar" ]; then
+  wget -O "$HERE/build/jna-platform.jar" "https://repo1.maven.org/maven2/net/java/dev/jna/jna-platform/$JNA_VERSION/jna-platform-$JNA_VERSION.jar"
+fi
 
 cd java
 "$JAVA_HOME"/bin/javac -d ../build -classpath "$HERE/build/jna.jar":"$HERE/build/jna-platform.jar":"$HERE/build/i2p.jar":"$HERE/build/router.jar":"$HERE/build/routerconsole.jar" \