diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 6076a5ef..b7b9dc44 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -55,6 +55,8 @@ set (CMAKE_CXX_STANDARD_REQUIRED ON)
 set (rtphone_libs libs)
 set (rtphone_engine engine)
 
+set (USE_AMR_CODEC OFF CACHE BOOL "Use AMR codec. Requires libraries.")
+
 set (RTPHONE_SOURCES
     ${rtphone_engine}/media/MT_Statistics.cpp
     ${rtphone_engine}/media/MT_WebRtc.cpp
@@ -115,7 +117,7 @@ endif (USE_AMR_CODEC)
 target_link_libraries(rtphone ice_stack jrtplib g729_codec gsm_codec
     gsmhr_codec g722_codec srtp resiprocate
     helper_lib audio_lib webrtc speexdsp
-    opus uuid)
+    opus uuid ${LIBS})
 
 
 target_include_directories(rtphone
diff --git a/src/engine/helper/HL_Process.cpp b/src/engine/helper/HL_Process.cpp
index e42be740..ca82d43c 100644
--- a/src/engine/helper/HL_Process.cpp
+++ b/src/engine/helper/HL_Process.cpp
@@ -75,7 +75,12 @@ std::string OsProcess::execCommand(const std::string& cmd)
 
     return output;
 }
+
 #else
+
+#include <memory>
+#include <stdexcept>
+
 std::string OsProcess::execCommand(const std::string& cmd)
 {
     std::string cp = cmd;