diff --git a/thirdparty/libcontext/CMakeLists.txt b/thirdparty/libcontext/CMakeLists.txt
index 095c38efb1..95761287fc 100644
--- a/thirdparty/libcontext/CMakeLists.txt
+++ b/thirdparty/libcontext/CMakeLists.txt
@@ -17,7 +17,7 @@ if( MSVC )
     enable_language(ASM_MASM)
 
     if( NOT LIBCONTEXT_USE_WINFIBER )
-        if ( KICAD_BUILD_ARCH_X84 )
+        if ( KICAD_BUILD_ARCH_X86 )
             set( CMAKE_ASM_MASM_FLAGS "${CMAKE_ASM_MASM_FLAGS} /safeseh" )
             list(APPEND LIBCONTEXT_SOURCES
                 make_i386_ms_pe_masm.asm