diff --git a/pCloudCC/lib/pclsync/Makefile b/pCloudCC/lib/pclsync/Makefile
index ffb86385..c326fb66 100644
--- a/pCloudCC/lib/pclsync/Makefile
+++ b/pCloudCC/lib/pclsync/Makefile
@@ -4,16 +4,26 @@ RANLIB=ranlib
 #USESSL=openssl
 USESSL=mbed
 
+# Architektur-Weiche
+ARCH := $(shell uname -m)
+ifeq ($(ARCH),armv7l)
+    MTUNE := cortex-a72
+else ifeq ($(ARCH),aarch64)
+    MTUNE := cortex-a72
+else
+    MTUNE := core2
+endif
+
 #CFLAGS=-Wall -Wpointer-arith -O2 -g -mtune=core2
-CFLAGS=-Wall -Wpointer-arith -O2 -g -fno-stack-protector -fomit-frame-pointer -mtune=core2 -I../sqlite -DP_ELECTRON -fPIC
+CFLAGS=-Wall -Wpointer-arith -O2 -g -fno-stack-protector -fomit-frame-pointer -I../sqlite -DP_ELECTRON -fPIC -mtune=$(MTUNE)
 
-#CFLAGS=-Wall -Wpointer-arith -O2 -g -fsanitize=address -mtune=core2
-#CFLAGS=-Wall -Wpointer-arith -O2 -g -fsanitize=address -mtune=core2 -I../sqlite
-#CFLAGS=-Wall -Wpointer-arith -Os -g -mtune=core2 -I../sqlite -pg
-#CFLAGS=-Wall -Wpointer-arith -O2 -g -fno-stack-protector -fomit-frame-pointer -mtune=core2 -I../sqlite/ -fPIC
-#CFLAGS=-Wall -Wpointer-arith -O2 -g -mtune=core2 -I../sqlite -pg -m32 -D_FILE_OFFSET_BITS=64
+#CFLAGS=-Wall -Wpointer-arith -O2 -g -fsanitize=address -mtune=$(MTUNE)
+#CFLAGS=-Wall -Wpointer-arith -O2 -g -fsanitize=address -mtune=$(MTUNE) -I../sqlite
+#CFLAGS=-Wall -Wpointer-arith -Os -g -mtune=$(MTUNE) -I../sqlite -pg
+#CFLAGS=-Wall -Wpointer-arith -O2 -g -fno-stack-protector -fomit-frame-pointer -mtune=$(MTUNE) -I../sqlite/ -fPIC
+#CFLAGS=-Wall -Wpointer-arith -O2 -g -mtune=$(MTUNE) -I../sqlite -pg -m32 -D_FILE_OFFSET_BITS=64
 #CFLAGS=-O2 -g -pg
-#CFLAGS=-Wall -Wpointer-arith -O2 -g -mtune=core2 -I../../psync32/zlib -I../../psync32/sqlite -m32 -D_FILE_OFFSET_BITS=64
+#CFLAGS=-Wall -Wpointer-arith -O2 -g -mtune=$(MTUNE) -I../../psync32/zlib -I../../psync32/sqlite -m32 -D_FILE_OFFSET_BITS=64
 
 LIB_A=psynclib.a
 #LIB_A=libpsynclib.a