diff --git a/radio/src/targets/horus/diskio.cpp b/radio/src/targets/horus/diskio.cpp
index ca8f9959b..b7157abcb 100644
--- a/radio/src/targets/horus/diskio.cpp
+++ b/radio/src/targets/horus/diskio.cpp
@@ -283,6 +283,16 @@ DRESULT disk_ioctl (
       *(WORD*)buff = SDCardInfo.CardBlockSize;
       res = RES_OK;
       break;
+
+    case CTRL_SYNC:
+      while (SD_GetStatus() == SD_TRANSFER_BUSY); /* Complete pending write process (needed at _FS_READONLY == 0) */
+      res = RES_OK;
+      break;
+
+    default:
+      res = RES_OK;
+      break;
+
   }
 
   return res;
diff --git a/radio/src/targets/simu/CMakeLists.txt b/radio/src/targets/simu/CMakeLists.txt
index c3f44ad51..e12c85b32 100644
--- a/radio/src/targets/simu/CMakeLists.txt
+++ b/radio/src/targets/simu/CMakeLists.txt
@@ -30,8 +30,14 @@ if(MSVC)
   include_directories(${PROJECT_SOURCE_DIR}/winbuild C:/Programs/pthreads/Pre-built.2/include C:/Programs/msinttypes C:/Programs/dirent/include)
   target_link_libraries(${SIMULATOR_TARGET} PRIVATE C:/Programs/pthreads/Pre-built.2/lib/pthreadVC2.lib)
 else()
+  if (${CMAKE_VERSION} VERSION_LESS 3.1.0})
+    set(COMMON_CPP_FLAGS "${COMMON_FLAGS} -std=gnu++11")
+    message("USING -std=gnu++11")
+  else()
+    set(COMMON_CPP_FLAGS ${COMMON_FLAGS})
+  endif()
   set(CMAKE_C_FLAGS_DEBUG  "${COMMON_FLAGS} -g -O0")
-  set(CMAKE_CXX_FLAGS_DEBUG  "${COMMON_FLAGS} -g -O0")
+  set(CMAKE_CXX_FLAGS_DEBUG  "${COMMON_CPP_FLAGS} -g -O0")
 endif()
 
 if(NOT WIN32)