EX-99.d.1.i

AMENDMENT NO. 4 TO

EXHIBIT A

OF THE INVESTMENT MANAGEMENT AGREEMENT

THIS EXHIBIT to the Investment Management Agreement dated January 4, 2010 (the “Agreement”) between DELAWARE GROUP INCOME FUNDS and DELAWARE MANAGEMENT COMPANY (the “Investment Manager”), a series of Delaware Management Business Trust, amended as of the 31^st day of January, 2017, lists the funds for which the Investment Manager provides investment management services pursuant to this Agreement, along with the management fee rate schedule for each fund and the date on which the Agreement became effective for each fund.

Fund Name	Effective Date	Management Fee Schedule (as a percentage of average daily net assets) Annual Rate
Delaware Corporate Bond Fund	January 4, 2010	0.50% on first $500 million
		0.475% on next $500 million
		0.45% on next $1.5 billion
		0.425% on assets in excess of $2.5 billion
Delaware Extended Duration Bond Fund	January 28, 2010	0.55% on first $500 million
		0.50% on next $500 million
		0.45% on next $1.5 billion
		0.425% on assets in excess of $2.5 billion
Delaware Floating Rate Fund (formerly, Delaware Diversified Floating Rate Fund)	February 25, 2010	0.50% on first $500 million
		0.475% on next $500 million
		0.45% on next $1.5 billion
		0.425% on assets in excess of $2.5 billion
Delaware High-Yield Opportunities Fund	January 4, 2010	0.65% on first $500 million
		0.60% on next $500 million
		0.55% on next $1.5 billion
		0.50% on assets in excess of $2.5 billion

DELAWARE MANAGEMENT COMPANY, A series of Delaware Management Business Trust		DELAWARE GROUP INCOME FUNDS
By:	/s/ DAVID F. CONNOR	By:	/s/ SHAWN K. LYTLE
Name:	David F. Connor	Name:	Shawn K. Lytle
Title:	Senior Vice President	Title:	President and Chief Executive Officer