diff --git a/dlls/api-ms-win-core-processthreads-l1-1-3/api-ms-win-core-processthreads-l1-1-3.spec b/dlls/api-ms-win-core-processthreads-l1-1-3/api-ms-win-core-processthreads-l1-1-3.spec
index 8f2daaefe74..77893f24225 100644
--- a/dlls/api-ms-win-core-processthreads-l1-1-3/api-ms-win-core-processthreads-l1-1-3.spec
+++ b/dlls/api-ms-win-core-processthreads-l1-1-3/api-ms-win-core-processthreads-l1-1-3.spec
@@ -7,4 +7,4 @@
 @ stub SetProcessInformation
 @ stdcall SetThreadDescription(ptr wstr) kernel32.SetThreadDescription
 @ stdcall SetThreadIdealProcessor(long long) kernel32.SetThreadIdealProcessor
-@ stub SetThreadSelectedCpuSets
+@ stdcall SetThreadSelectedCpuSets(ptr ptr long) kernel32.SetThreadSelectedCpuSets
diff --git a/dlls/kernel32/kernel32.spec b/dlls/kernel32/kernel32.spec
index 6948ba45fce..87e67d3743d 100644
--- a/dlls/kernel32/kernel32.spec
+++ b/dlls/kernel32/kernel32.spec
@@ -1471,6 +1471,7 @@
 @ stdcall -import SetThreadPreferredUILanguages(long ptr ptr)
 @ stdcall -import SetThreadPriority(long long)
 @ stdcall -import SetThreadPriorityBoost(long long)
+@ stdcall -import SetThreadSelectedCpuSets(ptr ptr long)
 @ stdcall -import SetThreadStackGuarantee(ptr)
 # @ stub SetThreadToken
 @ stdcall -import SetThreadUILanguage(long)
diff --git a/dlls/kernelbase/kernelbase.spec b/dlls/kernelbase/kernelbase.spec
index 28cfd842223..9a66c5c2ac0 100644
--- a/dlls/kernelbase/kernelbase.spec
+++ b/dlls/kernelbase/kernelbase.spec
@@ -1494,7 +1494,7 @@
 @ stdcall SetThreadPreferredUILanguages(long ptr ptr)
 @ stdcall SetThreadPriority(long long)
 @ stdcall SetThreadPriorityBoost(long long)
-# @ stub SetThreadSelectedCpuSets
+@ stdcall SetThreadSelectedCpuSets(ptr ptr long)
 @ stdcall SetThreadStackGuarantee(ptr)
 @ stdcall SetThreadToken(ptr ptr)
 @ stdcall SetThreadUILanguage(long)
diff --git a/dlls/kernelbase/memory.c b/dlls/kernelbase/memory.c
index 4b71c0cc6ec..fb5f5100399 100644
--- a/dlls/kernelbase/memory.c
+++ b/dlls/kernelbase/memory.c
@@ -1168,6 +1168,17 @@ BOOL WINAPI GetSystemCpuSetInformation(SYSTEM_CPU_SET_INFORMATION *info, ULONG b
 }
 
 
+/***********************************************************************
+ *           SetThreadSelectedCpuSets   (kernelbase.@)
+ */
+BOOL WINAPI SetThreadSelectedCpuSets(HANDLE thread, const ULONG *cpu_set_ids, ULONG count)
+{
+    FIXME( "thread %p, cpu_set_ids %p, count %u stub.\n", thread, cpu_set_ids, count );
+
+    return TRUE;
+}
+
+
 /**********************************************************************
  *             GetNumaHighestNodeNumber   (kernelbase.@)
  */