diff --git a/cli-lanterna/build.gradle b/cli-lanterna/build.gradle
index 8a585904..bd31bd89 100644
--- a/cli-lanterna/build.gradle
+++ b/cli-lanterna/build.gradle
@@ -14,7 +14,7 @@ apply plugin : 'application'
 mainClassName = 'com.muwire.clilanterna.CliLanterna'
 apply plugin : 'com.github.johnrengelman.shadow'
 
-applicationDefaultJvmArgs = ['-Djava.util.logging.config.file=logging.properties -Xmx256M']
+applicationDefaultJvmArgs = ['-Djava.util.logging.config.file=logging.properties','-Xmx256M']
 
 dependencies {
     compile project(":core")
diff --git a/gui/build.gradle b/gui/build.gradle
index 71b903e0..f321ce60 100644
--- a/gui/build.gradle
+++ b/gui/build.gradle
@@ -41,7 +41,7 @@ griffon {
 }
 
 mainClassName = 'com.muwire.gui.Launcher'
-applicationDefaultJvmArgs = ['-Djava.util.logging.config.file=logging.properties -Xmx256M']
+applicationDefaultJvmArgs = ['-Djava.util.logging.config.file=logging.properties','-Xmx256M']
 
 apply from: 'gradle/publishing.gradle'
 // apply from: 'gradle/code-coverage.gradle'