diff --git a/vlib/builtin/builtin_d_gcboehm.c.v b/vlib/builtin/builtin_d_gcboehm.c.v
index 4493cab0df..55f33ea872 100644
--- a/vlib/builtin/builtin_d_gcboehm.c.v
+++ b/vlib/builtin/builtin_d_gcboehm.c.v
@@ -29,6 +29,9 @@ $if static_boehm ? {
 			#flag -I@VEXEROOT/thirdparty/libgc/include
 			#flag -L@VEXEROOT/thirdparty/libgc
 			#flag -lgc
+		} $else $if msvc {
+			#flag -DGC_BUILTIN_ATOMIC=1
+			#flag -I@VEXEROOT/thirdparty/libgc/include
 		} $else {
 			#flag -DGC_BUILTIN_ATOMIC=1
 			#flag -I@VEXEROOT/thirdparty/libgc
@@ -49,6 +52,9 @@ $if static_boehm ? {
 			#flag -I@VEXEROOT/thirdparty/libgc/include
 			#flag -L@VEXEROOT/thirdparty/libgc
 			#flag -lgc
+		} $else $if msvc {
+			#flag -DGC_BUILTIN_ATOMIC=1
+			#flag -I@VEXEROOT/thirdparty/libgc/include
 		} $else {
 			#flag -DGC_BUILTIN_ATOMIC=1
 			#flag -I@VEXEROOT/thirdparty/libgc