diff --git a/prism/src/bin/prism.darwin32 b/prism/src/bin/prism.darwin32
index c29b58db..afa71aff 100755
--- a/prism/src/bin/prism.darwin32
+++ b/prism/src/bin/prism.darwin32
@@ -92,7 +92,7 @@ if [ "$PRISM_DEBUG" != "" ]; then
 fi
 
 # Run PRISM through Java
-"$PRISM_JAVA" $PRISM_JAVA_ARG1 $PRISM_JAVA_ARG2 -d32 $PRISM_JAVA_DEBUG $PRISM_JAVAMAXMEM $PRISM_JAVASTACKSIZE "$PRISM_ICON" "$PRISM_DOCK_NAME" -Djava.awt.headless=$PRISM_HEADLESS -Djava.library.path="$JAVA_LIBRARY_PATH" -classpath "$PRISM_CLASSPATH" $PRISM_MAINCLASS "$@"
+"$PRISM_JAVA" $PRISM_JAVA_ARG1 $PRISM_JAVA_ARG2 $PRISM_JAVA_DEBUG $PRISM_JAVAMAXMEM $PRISM_JAVASTACKSIZE "$PRISM_ICON" "$PRISM_DOCK_NAME" -Djava.awt.headless=$PRISM_HEADLESS -Djava.library.path="$JAVA_LIBRARY_PATH" -classpath "$PRISM_CLASSPATH" $PRISM_MAINCLASS "$@"
 
 PRISM_EXIT_CODE=$?
 
diff --git a/prism/src/bin/prism.darwin64 b/prism/src/bin/prism.darwin64
index dd1e73b0..afa71aff 100755
--- a/prism/src/bin/prism.darwin64
+++ b/prism/src/bin/prism.darwin64
@@ -92,7 +92,7 @@ if [ "$PRISM_DEBUG" != "" ]; then
 fi
 
 # Run PRISM through Java
-"$PRISM_JAVA" $PRISM_JAVA_ARG1 $PRISM_JAVA_ARG2 -d64 $PRISM_JAVA_DEBUG $PRISM_JAVAMAXMEM $PRISM_JAVASTACKSIZE "$PRISM_ICON" "$PRISM_DOCK_NAME" -Djava.awt.headless=$PRISM_HEADLESS -Djava.library.path="$JAVA_LIBRARY_PATH" -classpath "$PRISM_CLASSPATH" $PRISM_MAINCLASS "$@"
+"$PRISM_JAVA" $PRISM_JAVA_ARG1 $PRISM_JAVA_ARG2 $PRISM_JAVA_DEBUG $PRISM_JAVAMAXMEM $PRISM_JAVASTACKSIZE "$PRISM_ICON" "$PRISM_DOCK_NAME" -Djava.awt.headless=$PRISM_HEADLESS -Djava.library.path="$JAVA_LIBRARY_PATH" -classpath "$PRISM_CLASSPATH" $PRISM_MAINCLASS "$@"
 
 PRISM_EXIT_CODE=$?