diff --git a/Makefile b/Makefile
index 4714655c..b5be7703 100644
--- a/Makefile
+++ b/Makefile
@@ -270,6 +270,8 @@ Q3CPPDIR=$(MOUNT_DIR)/tools/lcc/cpp
 Q3LCCETCDIR=$(MOUNT_DIR)/tools/lcc/etc
 Q3LCCSRCDIR=$(MOUNT_DIR)/tools/lcc/src
 AUTOUPDATERSRCDIR=$(MOUNT_DIR)/autoupdater
+LIBTOMCRYPTSRCDIR=$(AUTOUPDATERSRCDIR)/rsa_tools/libtomcrypt-1.17
+TOMSFASTMATHSRCDIR=$(AUTOUPDATERSRCDIR)/rsa_tools/tomsfastmath-0.13.1
 LOKISETUPDIR=misc/setup
 NSISDIR=misc/nsis
 SDLHDIR=$(MOUNT_DIR)/SDL2
@@ -376,7 +378,7 @@ ifneq (,$(findstring "$(PLATFORM)", "linux" "gnu_kfreebsd" "kfreebsd-gnu" "gnu")
 
   THREAD_LIBS=-lpthread
   LIBS=-ldl -lm
-  AUTOUPDATER_LIBS += -ldl
+  AUTOUPDATER_LIBS += -ldl $(LIBTOMCRYPTSRCDIR)/libtomcrypt.a $(TOMSFASTMATHSRCDIR)/libtfm.a
 
   CLIENT_LIBS=$(SDL_LIBS)
   RENDERER_LIBS = $(SDL_LIBS) -lGL
@@ -419,6 +421,8 @@ ifeq ($(PLATFORM),darwin)
   RENDERER_LIBS=
   OPTIMIZEVM=
 
+  AUTOUPDATER_LIBS += $(LIBTOMCRYPTSRCDIR)/libtomcrypt.a $(TOMSFASTMATHSRCDIR)/libtfm.a
+
   # Default minimum Mac OS X version
   ifeq ($(MACOSX_VERSION_MIN),)
     MACOSX_VERSION_MIN=10.7
@@ -1601,12 +1605,11 @@ $(Q3ASM): $(Q3ASMOBJ)
 
 define DO_AUTOUPDATER_CC
 $(echo_cmd) "AUTOUPDATER_CC $<"
-$(Q)$(CC) $(CFLAGS) $(CURL_CFLAGS) -o $@ -c $<
+$(Q)$(CC) $(CFLAGS) -I$(LIBTOMCRYPTSRCDIR)/src/headers -I$(TOMSFASTMATHSRCDIR)/src/headers $(CURL_CFLAGS) -o $@ -c $<
 endef
 
 Q3AUTOUPDATEROBJ = \
   $(B)/autoupdater/autoupdater.o \
-  $(B)/autoupdater/sha256.o
 
 $(B)/autoupdater/%.o: $(AUTOUPDATERSRCDIR)/%.c
 	$(DO_AUTOUPDATER_CC)
diff --git a/code/autoupdater/rsa_tools/build-libtom-unix.sh b/code/autoupdater/rsa_tools/build-libtom-unix.sh
index 4e61732f..bbd86312 100755
--- a/code/autoupdater/rsa_tools/build-libtom-unix.sh
+++ b/code/autoupdater/rsa_tools/build-libtom-unix.sh
@@ -10,6 +10,8 @@ if [ "$OSTYPE" = "Linux" ]; then
     let NCPU=$NCPU+1
 elif [ "$OSTYPE" = "Darwin" ]; then
     NCPU=`sysctl -n hw.ncpu`
+    export CFLAGS="$CFLAGS -mmacosx-version-min=10.7 -DMAC_OS_X_VERSION_MIN_REQUIRED=1070"
+    export LDFLAGS="$LDFLAGS -mmacosx-version-min=10.7"
 elif [ "$OSTYPE" = "SunOS" ]; then
     NCPU=`/usr/sbin/psrinfo |wc -l |sed -e 's/^ *//g;s/ *$//g'`
 else
diff --git a/code/autoupdater/rsa_tools/build-rsa-tools.sh b/code/autoupdater/rsa_tools/build-rsa-tools.sh
index 212d6e70..422e48d5 100755
--- a/code/autoupdater/rsa_tools/build-rsa-tools.sh
+++ b/code/autoupdater/rsa_tools/build-rsa-tools.sh
@@ -7,7 +7,7 @@ export TFMDIR="tomsfastmath-0.13.1"
 export LTCDIR="libtomcrypt-1.17"
 
 function build {
-    clang -I $TFMDIR/src/headers -I $LTCDIR/src/headers -o "$1" -Wall -O3 "$1.c" rsa_common.c $LTCDIR/libtomcrypt.a $TFMDIR/libtfm.a
+    clang -mmacosx-version-min=10.7 -DMAC_OS_X_VERSION_MIN_REQUIRED=1070 -I $TFMDIR/src/headers -I $LTCDIR/src/headers -o "$1" -Wall -O3 "$1.c" rsa_common.c $LTCDIR/libtomcrypt.a $TFMDIR/libtfm.a
 }
 
 set -e