diff --git a/Makefile b/Makefile
index 6a79300c..82af31e0 100644
--- a/Makefile
+++ b/Makefile
@@ -218,5 +218,7 @@ cross-qemu:
 	@echo "	2) apt install binfmt-support qemu-user-static qemu-user qemu-system-arm qemu-system-mips qemu-system-misc qemu-system-ppc qemu-system-sparc"
 	@for CC in $(CROSS_LIST); do \
 		echo "===================== $$CC + qemu"; \
-		$(MAKE) clean && CC=$$CC CXX=$$(echo $$CC | sed 's/-gcc/-g++/') EXE_LDFLAGS=-static $(MAKE) check-singleprocess || exit $$?; \
+		$(MAKE) clean && \
+			CC=$$CC CXX=$$(echo $$CC | sed 's/-gcc/-g++/') EXE_LDFLAGS=-static XCFLAGS="-DMDBX_SAFE4QEMU $(XCFLAGS)" \
+			$(MAKE) check-singleprocess || exit $$?; \
 	done
diff --git a/src/lck-posix.c b/src/lck-posix.c
index 97439553..2633d447 100644
--- a/src/lck-posix.c
+++ b/src/lck-posix.c
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
@@ -149,7 +149,7 @@ int __cold mdbx_lck_init(MDBX_env *env) {
     goto bailout;
 #endif /* MDBX_USE_ROBUST */
 
-#if _POSIX_C_SOURCE >= 199506L
+#if _POSIX_C_SOURCE >= 199506L && !defined(MDBX_SAFE4QEMU)
   rc = pthread_mutexattr_setprotocol(&ma, PTHREAD_PRIO_INHERIT);
   if (rc == ENOTSUP)
     rc = pthread_mutexattr_setprotocol(&ma, PTHREAD_PRIO_NONE);
diff --git a/test/utils.cc b/test/utils.cc
index 05d28f0c..622c4d09 100644
--- a/test/utils.cc
+++ b/test/utils.cc
@@ -186,7 +186,8 @@ uint64_t entropy_ticks(void) {
   ticks |= low & /* zeroes if high part has changed */
            ~(high_before - high_after);
 #endif
-#elif defined(__aarch64__) || (defined(__ARM_ARCH) && __ARM_ARCH > 7)
+#elif (defined(__aarch64__) || (defined(__ARM_ARCH) && __ARM_ARCH > 7)) &&     \
+    !defined(MDBX_SAFE4QEMU)
   uint64_t virtual_timer;
   __asm __volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer));
   return virtual_timer;