diff -r 5a67c209abb4 -r 676afd13dea5 common/autoconf/build-performance.m4
--- a/common/autoconf/build-performance.m4	Thu May 11 20:19:08 2017 +0000
+++ b/common/autoconf/build-performance.m4	Fri May 12 21:13:24 2017 +0200
@@ -417,10 +417,8 @@
   AC_SUBST(SJAVAC_SERVER_JAVA)
 
   if test "$MEMORY_SIZE" -gt "3000"; then
-    ADD_JVM_ARG_IF_OK([-d64],SJAVAC_SERVER_JAVA_FLAGS,[$SJAVAC_SERVER_JAVA])
-    if test "$JVM_ARG_OK" = true; then
+    if "$JAVA" -version 2>&1 | $GREP -q "64-Bit"; then
       JVM_64BIT=true
-      JVM_ARG_OK=false
     fi
   fi