diff --git a/cmake/px4_find_python_module.cmake b/cmake/px4_find_python_module.cmake
index 4412abd1be..55155e2d9a 100644
--- a/cmake/px4_find_python_module.cmake
+++ b/cmake/px4_find_python_module.cmake
@@ -31,6 +31,12 @@
 #
 ############################################################################
 
+# cmake include guard
+if(px4_find_python_module_included)
+	return()
+endif(px4_find_python_module_included)
+set(px4_find_python_module_included true)
+
 #
 #	px4_find_python_module
 #
diff --git a/cmake/px4_git.cmake b/cmake/px4_git.cmake
index 1f35203ccd..22fb7d358b 100644
--- a/cmake/px4_git.cmake
+++ b/cmake/px4_git.cmake
@@ -31,6 +31,12 @@
 #
 ############################################################################
 
+# cmake include guard
+if(px4_git_included)
+	return()
+endif(px4_git_included)
+set(px4_git_included true)
+
 #=============================================================================
 #
 #	px4_add_git_submodule
diff --git a/cmake/px4_parse_function_args.cmake b/cmake/px4_parse_function_args.cmake
index cee0827c78..d7a23344db 100644
--- a/cmake/px4_parse_function_args.cmake
+++ b/cmake/px4_parse_function_args.cmake
@@ -31,6 +31,12 @@
 #
 ############################################################################
 
+# cmake include guard
+if(px4_parse_function_args_included)
+	return()
+endif(px4_parse_function_args_included)
+set(px4_parse_function_args_included true)
+
 #=============================================================================
 #
 #	px4_parse_function_args