diff --git a/snpeff.wdl b/snpeff.wdl
index 95383b946bbd9c964bb3ea75477a666f3351a351..079a720ab5565d9d26efb0b39b0ec876966b0911 100644
--- a/snpeff.wdl
+++ b/snpeff.wdl
@@ -24,7 +24,7 @@ task SnpEff {
         set -e
         mkdir -p "$(dirname ~{outputPath})"
         unzip ~{datadirZip}
-        snpEff -Xmx~{javaXmx}G  -XX:ParallelGCThreads=1 \
+        snpEff -Xmx~{javaXmx}  -XX:ParallelGCThreads=1 \
         -v \
         ~{genomeVersion} \
         -noDownload \