Index: share/mk/src.opts.mk
===================================================================
--- share/mk/src.opts.mk
+++ share/mk/src.opts.mk
@@ -479,6 +479,12 @@
 MK_LLVM_COV:= no
 .endif
 
+.if ${MK_ASAN} == "yes"
+# In order to get sensible backtraces from ASAN we have to install
+# llvm-symbolizer as /usr/bin/addr2line instead of the elftoolchain version.
+MK_LLVM_BINUTILS:=	yes
+.endif
+
 .if ${MK_LLVM_BINUTILS} == "yes"
 # MK_LLVM_CXXFILT is a subset of MK_LLVM_BINUTILS and should therefore be
 # enabled if MK_LLVM_BINUTILS is set.