diff --git a/sys/conf/Makefile.arm b/sys/conf/Makefile.arm
index e2ee825e7da9..178500172ae6 100644
--- a/sys/conf/Makefile.arm
+++ b/sys/conf/Makefile.arm
@@ -41,6 +41,9 @@ CC += -mbig-endian
 SYSTEM_LD += -EB
 .endif
 
+.if !defined(DEBUG)
+CFLAGS += -mno-apcs-frame
+.endif
 %BEFORE_DEPEND
 
 %OBJS