diff --git a/java/builder.go b/java/builder.go
index c39bd4e..d6f8c5b 100644
--- a/java/builder.go
+++ b/java/builder.go
@@ -53,7 +53,7 @@
 	errorprone = pctx.AndroidStaticRule("errorprone",
 		blueprint.RuleParams{
 			Command: `rm -rf "$outDir" "$annoDir" && mkdir -p "$outDir" "$annoDir" && ` +
-				`${config.ErrorProneCmd}` +
+				`${config.ErrorProneCmd} ` +
 				`$javacFlags $bootClasspath $classpath ` +
 				`-source $javaVersion -target $javaVersion ` +
 				`-d $outDir -s $annoDir @$out.rsp && ` +