diff --git a/pkgs/development/compilers/gcc/common/extra-target-flags.nix b/pkgs/development/compilers/gcc/common/extra-target-flags.nix
index da2ab3029561..437a015dbf7b 100644
--- a/pkgs/development/compilers/gcc/common/extra-target-flags.nix
+++ b/pkgs/development/compilers/gcc/common/extra-target-flags.nix
@@ -27,7 +27,9 @@ in
           ]
         );
     in
-    mkFlags libcCross ++ lib.optionals (!withoutTargetLibc) (mkFlags (threadsCross.package or null));
+    mkFlags libcCross
+    ++ lib.optionals (!withoutTargetLibc) (mkFlags (threadsCross.package or null))
+    ++ mkFlags (libcCross.w32api or null);
 
   EXTRA_LDFLAGS_FOR_TARGET =
     let
@@ -50,5 +52,7 @@ in
           )
         );
     in
-    mkFlags libcCross ++ lib.optionals (!withoutTargetLibc) (mkFlags (threadsCross.package or null));
+    mkFlags libcCross
+    ++ lib.optionals (!withoutTargetLibc) (mkFlags (threadsCross.package or null))
+    ++ mkFlags (libcCross.w32api or null);
 }