diff --git a/pyproject-rpm-macros.spec b/pyproject-rpm-macros.spec
index ddb16b5..95afac5 100644
--- a/pyproject-rpm-macros.spec
+++ b/pyproject-rpm-macros.spec
@@ -77,6 +77,12 @@ Requires:       (pyproject-srpm-macros = %{?epoch:%{epoch}:}%{version}-%{release
 Requires:       /usr/bin/find
 Requires:       /usr/bin/sed
 
+# This package requires the %%generate_buildrequires functionality.
+# It has been introduced in RPM 4.15 (4.14.90 is the alpha of 4.15).
+# What we need is rpmlib(DynamicBuildRequires), but that is impossible to (Build)Require.
+Requires:       (rpm-build >= 4.14.90 if rpm-build)
+BuildRequires:  rpm-build >= 4.14.90
+
 %description
 These macros allow projects that follow the Python packaging specifications
 to be packaged as RPMs.
@@ -95,6 +101,7 @@ which only work with setup.py.
 %package -n pyproject-srpm-macros
 Summary:        Minimal implementation of %%pyproject_buildrequires
 Requires:       (pyproject-rpm-macros = %{?epoch:%{epoch}:}%{version}-%{release} if pyproject-rpm-macros)
+Requires:       (rpm-build >= 4.14.90 if rpm-build)
 
 %description -n pyproject-srpm-macros
 This package contains a minimal implementation of %%pyproject_buildrequires.
@@ -109,6 +116,9 @@ takes precedence.
 %setup -c -T
 cp -p %{sources} .
 
+%generate_buildrequires
+# nothing to do, this is here just to assert we have that functionality
+
 %build
 # nothing to do, sources are not buildable