diff --git a/jaxb-ri/bundles/ri/src/main/resources/bin/schemagen.sh b/jaxb-ri/bundles/ri/src/main/resources/bin/schemagen.sh
index f7eefab..339a2f2 100755
--- a/jaxb-ri/bundles/ri/src/main/resources/bin/schemagen.sh
+++ b/jaxb-ri/bundles/ri/src/main/resources/bin/schemagen.sh
@@ -82,7 +82,7 @@
     unset JAVA_TOOL_OPTIONS
 fi
 
-JAVA_VERSION=`${JAVA} -version 2>&1 | head -n 1 | cut -d'"' -f2 | sed -E 's/^(1\.)?([0-9]+).+$/\2/'`
+JAVA_VERSION=$("$JAVA" -version 2>&1 | head -n 1 | cut -d'"' -f2 | sed -E 's/^(1\.)?([0-9]+).+$/\2/')
 echo "Java major version: ${JAVA_VERSION}"
 
 if [ -n "$_OPTS" ]