diff --git a/share/mk/bsd.compiler.mk b/share/mk/bsd.compiler.mk
--- a/share/mk/bsd.compiler.mk
+++ b/share/mk/bsd.compiler.mk
@@ -226,6 +226,10 @@
 .if ${${X_}COMPILER_TYPE} == "clang"
 ${X_}COMPILER_FEATURES+=	retpoline init-all
 .endif
+.if ${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 100000 || \
+	(${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 80100)
+${X_}COMPILER_FEATURES+=	fileprefixmap
+.endif
 
 .else
 # Use CC's values