diff --git a/src/system/libroot/posix/glibc/arch/x86_64/Jamfile b/src/system/libroot/posix/glibc/arch/x86_64/Jamfile
index 80d2797fd0..c03941fc80 100644
--- a/src/system/libroot/posix/glibc/arch/x86_64/Jamfile
+++ b/src/system/libroot/posix/glibc/arch/x86_64/Jamfile
@@ -21,7 +21,7 @@ SubDirAsFlags -DPIC ;
 
 local genericSources =
 	cmp.c dbl2mpn.c divrem.c
-	mpn2dbl.c mpn2flt.c mpn2ldbl.c
+	mpn2dbl.c mpn2flt.c
 	mul.c mul_n.c
 
 	s_cacos.c s_cacosf.c s_cacosl.c
@@ -47,6 +47,7 @@ for architectureObject in [ MultiArchSubDirSetup x86_64 ] {
 			add_n.S
 			addmul_1.S
 			ldbl2mpn.c
+			mpn2ldbl.c
 
 			mul_1.S
 			lshift.S rshift.S