diff --git a/python-psutil-include-unistd.h.patch b/python-psutil-include-unistd.h.patch
new file mode 100644
index 0000000..5719977
--- /dev/null
+++ b/python-psutil-include-unistd.h.patch
@@ -0,0 +1,12 @@
+diff --git a/psutil/_psutil_linux.c b/psutil/_psutil_linux.c
+index a6ee602..56fd4f6 100644
+--- a/psutil/_psutil_linux.c
++++ b/psutil/_psutil_linux.c
+@@ -24,6 +24,7 @@
+ #include <linux/sockios.h>
+ #include <linux/if.h>
+ #include <sys/resource.h>
++#include <unistd.h>
+ 
+ // see: https://github.com/giampaolo/psutil/issues/659
+ #ifdef PSUTIL_ETHTOOL_MISSING_TYPES
diff --git a/python-psutil.spec b/python-psutil.spec
index dca0659..008746b 100644
--- a/python-psutil.spec
+++ b/python-psutil.spec
@@ -17,6 +17,13 @@ Patch0:         python-psutil-skip-tests-in-mock.patch
 # avoid: AssertionError: 7883822.420000001 != 7883822.42
 #
 Patch1:         python-psutil-test-sum-floats-via-almost-equal.patch
+#
+# include unistd.h to avoid (on Python 3.13+):
+#   error: implicit declaration of function ‘syscall’
+#   error: implicit declaration of function ‘close’
+# upstream PR: https://github.com/giampaolo/psutil/pull/2321
+#
+Patch2:         python-psutil-include-unistd.h.patch
 
 BuildRequires:  gcc
 BuildRequires:  grep