diff --git a/compiler/systems.pas b/compiler/systems.pas
index 9863c32dca..190d1b32e4 100644
--- a/compiler/systems.pas
+++ b/compiler/systems.pas
@@ -400,8 +400,8 @@ interface
                                    system_riscv32_linux,system_riscv64_linux,
                                    system_aarch64_win64,
                                    system_z80_zxspectrum,system_z80_msxdos,
-                                   system_wasm32_wasip1,system_loongarch64_linux,
-                                   system_mipsel_ps1
+                                   system_wasm32_wasip1,system_wasm32_wasip1threads,
+                                   system_loongarch64_linux,system_mipsel_ps1
                                   ]+systems_darwin+systems_amigalike;
 
        { all systems that use the PE+ header in the PE/COFF file