diff --git a/doc/install.html b/doc/install.html
index da350b9c..49d6e9ed 100644
--- a/doc/install.html
+++ b/doc/install.html
@@ -222,8 +222,8 @@ You can add an extra prefix to the search paths by appending the
 make PREFIX=/home/myself/lj2
 </pre>
 <p>
-Note for OSX: if the <tt>MACOSX_DEPLOYMENT_TARGET</tt> environment
-variable is not set, then it's forced to <tt>10.4</tt>.
+Note for OSX: you must set the <tt>MACOSX_DEPLOYMENT_TARGET</tt>
+environment variable to a value supported by your toolchain.
 </p>
 <h3>Installing LuaJIT</h3>
 <p>
diff --git a/src/Makefile b/src/Makefile
index d22eb732..71c284e2 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -158,7 +158,6 @@ XCFLAGS=
 
 ifeq (Windows,$(findstring Windows,$(OS))$(MSYSTEM)$(TERM))
   HOST_SYS= Windows
-  HOST_RM= del
 else
   HOST_SYS:= $(shell uname -s)
   ifneq (,$(findstring MINGW,$(HOST_SYS)))
@@ -221,6 +220,7 @@ TARGET_SONAME= libluajit-$(ABIVER).so.$(MAJVER)
 TARGET_DYLIBNAME= libluajit-$(ABIVER).$(MAJVER).dylib
 TARGET_DYLIBPATH= $(TARGET_LIBPATH)/$(TARGET_DYLIBNAME)
 TARGET_DLLNAME= lua$(NODOTABIVER).dll
+TARGET_DLLDOTANAME= libluajit-$(ABIVER).dll.a
 TARGET_XSHLDFLAGS= -shared -fPIC -Wl,-soname,$(TARGET_SONAME)
 TARGET_DYNXLDOPTS=
 
@@ -309,8 +309,9 @@ endif
 TARGET_SYS?= $(HOST_SYS)
 ifeq (Windows,$(TARGET_SYS))
   TARGET_STRIP+= --strip-unneeded
-  TARGET_XSHLDFLAGS= -shared
+  TARGET_XSHLDFLAGS= -shared -Wl,--out-implib,$(TARGET_DLLDOTANAME)
   TARGET_DYNXLDOPTS=
+  HOST_RM= del
 else
   TARGET_AR+= 2>/dev/null
 ifeq (,$(shell $(TARGET_CC) -o /dev/null -c -x c /dev/null -fno-stack-protector 2>/dev/null || echo 1))
@@ -318,7 +319,7 @@ ifeq (,$(shell $(TARGET_CC) -o /dev/null -c -x c /dev/null -fno-stack-protector
 endif
 ifeq (Darwin,$(TARGET_SYS))
   ifeq (,$(MACOSX_DEPLOYMENT_TARGET))
-    export MACOSX_DEPLOYMENT_TARGET=10.4
+    $(error missing: export MACOSX_DEPLOYMENT_TARGET=XX.YY)
   endif
   TARGET_STRIP+= -x
   TARGET_XSHLDFLAGS= -dynamiclib -single_module -undefined dynamic_lookup -fPIC
diff --git a/src/lj_err.c b/src/lj_err.c
index abf176e5..83118551 100644
--- a/src/lj_err.c
+++ b/src/lj_err.c
@@ -287,12 +287,7 @@ LJ_FUNCA int lj_err_unwind_dwarf(int version, int actions,
 }
 
 #if LJ_UNWIND_EXT
-#if LJ_TARGET_OSX || defined(__OpenBSD__)
-/* Sorry, no thread safety for OSX. Complain to Apple, not me. */
-static _Unwind_Exception static_uex;
-#else
 static __thread _Unwind_Exception static_uex;
-#endif
 
 /* Raise DWARF2 exception. */
 static void err_raise_ext(int errcode)