diff --git a/src/system/libroot/posix/glibc/arch/x86/Jamfile b/src/system/libroot/posix/glibc/arch/x86/Jamfile
index 76f45e5e27..91cf03623f 100644
--- a/src/system/libroot/posix/glibc/arch/x86/Jamfile
+++ b/src/system/libroot/posix/glibc/arch/x86/Jamfile
@@ -60,7 +60,7 @@ local genericSources =
 	s_modf.c s_modff.c # s_modfl.c
 	s_nan.c s_nanf.c
 	s_nextafter.c
-	s_signbit.c s_signbitl.c
+	s_signbit.c s_signbitf.c s_signbitl.c
 	s_round.c s_roundf.c # s_roundl.c
 	s_signgam.c
 	s_tanh.c s_tanhf.c