diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9320287..93f0e07 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,10 +60,11 @@ if(GST_BUILD)
         add_definitions(-DRPI)
         include(${CMAKE_CURRENT_SOURCE_DIR}/cmake_modules/functions.cmake)
         findRpiRevision( RPI_REVISION )
-        if(RPI_REVISION MATCHES "a03111" OR RPI_REVISION MATCHES "b03111" OR RPI_REVISION MATCHES "a03111")
+        set(RPI_4_REVISIONS a03111 b03111 b03112 c03111 c03112 d03114)
+        if(RPI_REVISION IN_LIST RPI_4_REVISIONS)
             message("Raspberry Pi 4 Found")
             add_definitions(-DPI4)
-        endif(RPI_REVISION MATCHES "a03111" OR RPI_REVISION MATCHES "b03111" OR RPI_REVISION MATCHES "a03111")
+        endif(RPI_REVISION IN_LIST RPI_4_REVISIONS)
     endif(RPI_BUILD)
 message(STATUS "${GST_LIBRARIES}")
 endif(GST_BUILD)
diff --git a/cmake_modules/functions.cmake b/cmake_modules/functions.cmake
index 18f5864..99be6e3 100644
--- a/cmake_modules/functions.cmake
+++ b/cmake_modules/functions.cmake
@@ -1,7 +1,7 @@
 
 function( findRpiRevision OUTPUT )
     # Find it with an automated script
-    execute_process( COMMAND grep -Po "^Revision\\s*:\\s*\\K[[:xdigit:]]+" /proc/cpuinfo OUTPUT_VARIABLE TMP )
+    execute_process( COMMAND grep -Po "^Revision\\s*:\\s*\\K[[:xdigit:]]+" /proc/cpuinfo OUTPUT_VARIABLE TMP OUTPUT_STRIP_TRAILING_WHITESPACE )
 
     # If have not found the Revision number, use the last version
     if ( TMP )