diff --git a/cmake/Modules/FindITPP.cmake b/cmake/Modules/FindITPP.cmake
index 4f3b4171..710a75bb 100644
--- a/cmake/Modules/FindITPP.cmake
+++ b/cmake/Modules/FindITPP.cmake
@@ -24,6 +24,7 @@ FIND_LIBRARY(ITPP_LIBRARY_NORMAL
   /usr/lib64
   /usr/lib
   /usr/local/lib
+  /usr/lib/x86_64-linux-gnu
   NO_DEFAULT_PATH
 )
 
@@ -35,6 +36,7 @@ FIND_LIBRARY(ITPP_LIBRARY_DEBUG
   /usr/lib64
   /usr/lib
   /usr/local/lib
+  /usr/lib/x86_64-linux-gnu
   NO_DEFAULT_PATH
 )
 
diff --git a/cmake/Modules/FindRTLSDR.cmake b/cmake/Modules/FindRTLSDR.cmake
index 169a4ae1..0f8c3c27 100644
--- a/cmake/Modules/FindRTLSDR.cmake
+++ b/cmake/Modules/FindRTLSDR.cmake
@@ -24,6 +24,7 @@ FIND_LIBRARY(RTLSDR_LIBRARY
   /usr/lib64
   /usr/lib
   /usr/local/lib
+  /usr/lib/x86_64-linux-gnu
   NO_DEFAULT_PATH
 )