How can I get ReportLab for line breaks in hyphens?

Question

I have a design template that forces me to use very large capital letters for the title. If I have a long word that does not fit on one line, I run into the expected problems, because RL has no built-in hyphens - everything is fine. However, if I have a long compound word containing a hyphen (for example, "VVVVEEEERRRRYYYY-LLLLOOOOONNNNGGGG"), it does not break into a hyphen as I expected.

Expected:

|VVVVEEEERRRRYYYY-      |
|LLLLOOOONNNNGGGG       |

Actual:

|VVVVEEEERRRRYYYY-LLLLOO|
|OONNNNGGGG             |

How can I tell ReportLab to execute a conditional line break when meeting with a hyphen?

BTW, PDF is created using Python 3.4 and reportlab 3.1.8 as follows:

doc = BaseDocTemplate(fname,
                      leftMargin=20 * mm, rightMargin=20 * mm,
                      topMargin=25 * mm, bottomMargin=20 * mm)
story = []
frame_first_page = Frame(doc.leftMargin, doc.bottomMargin, doc.width,
                         doc.height - 24 * mm,
                         leftPadding=0, rightPadding=0, id='first')
doc.addPageTemplates([PageTemplate(id='first_page',
                      frames=frame_first_page,
                      onPage=_on_first_page),
                      PageTemplate(id='remaining_pages',
                      frames=frame_remaining_pages,
                      onPage=_on_remaining_pages)])
story.append(Paragraph(heading_text.upper(), styles["title"]))
doc.build(story)