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      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/OrganizationAndBusinessAdditionalInformationDetails" id="OrganizationAndBusinessAdditionalInformationDetails">
        <link:definition>124 - Disclosure - Organization and Business (Additional Information) (Details)</link:definition>

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      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetails" id="SummaryOfSignificantAccountingPoliciesAdditionalInformationDetails">
        <link:definition>125 - Disclosure - Summary of Significant Accounting Policies (Additional Information) (Details)</link:definition>

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        <link:definition>126 - Disclosure - Fees Paid by the Fund and Related Party Transactions (Additional Information) (Details)</link:definition>

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        <link:definition>127 - Disclosure - Contracts and Agreements (Brokerage Commissions) (Details)</link:definition>

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      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/ContractsAndAgreementsAdditionalInformationDetails" id="ContractsAndAgreementsAdditionalInformationDetails">
        <link:definition>128 - Disclosure - Contracts and Agreements (Additional Information) (Details)</link:definition>

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        <link:usedOn>link:definitionLink</link:usedOn>

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        <link:definition>129 - Disclosure - Financial Instruments, Off-Balance Sheet Risks and Contingencies (Additional Information) (Details)</link:definition>

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        <link:usedOn>link:definitionLink</link:usedOn>

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      <link:roleType roleURI="http://www.unitedstates12monthoilfund.com/role/FinancialHighlightsPerUnitPerformanceDataAndOtherSupplementalFinancialDataDetails" id="FinancialHighlightsPerUnitPerformanceDataAndOtherSupplementalFinancialDataDetails">
        <link:definition>130 - Disclosure - Financial Highlights (Per Unit Performance Data and Other Supplemental Financial Data) (Details)</link:definition>

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        <link:definition>131 - Disclosure - Quarterly Financial Data (Unaudited) (Summarized Quarterly Financial Information (Details)</link:definition>

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        <link:definition>132 - Disclosure - Fair Value of Financial Instruments (Valuation of Securities Using Fair Value Hierarchy) (Details)</link:definition>

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        <link:definition>133 - Disclosure - Fair Value of Financial Instruments (Fair Value of Derivative Instruments) (Details)</link:definition>

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        <link:definition>134 - Disclosure - Fair Value of Financial Instruments (Effect of Derivative Instruments on Condensed Statements of Operations) (Details)</link:definition>

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