diff --git a/cmake/modules/FindAvahi.cmake b/cmake/modules/FindAvahi.cmake
index 4a3cdd0..9dc2761 100644
--- a/cmake/modules/FindAvahi.cmake
+++ b/cmake/modules/FindAvahi.cmake
@@ -9,7 +9,7 @@ if(AVAHI_CLIENT_LIBRARY)
     set(AVAHI_CLIENT_FOUND TRUE)
 endif()
 
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(AVAHI DEFAULT_MSG AVAHI_COMMON_FOUND AVAHI_CLIENT_FOUND)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(Avahi DEFAULT_MSG AVAHI_COMMON_FOUND AVAHI_CLIENT_FOUND)
 
 if (AVAHI_FOUND)
     set(AVAHI_INCLUDE_DIRS ${AVAHI_UI_INCLUDE_DIR})
diff --git a/cmake/modules/Findhamlib.cmake b/cmake/modules/Findhamlib.cmake
index 2086a98..16ca568 100644
--- a/cmake/modules/Findhamlib.cmake
+++ b/cmake/modules/Findhamlib.cmake
@@ -52,7 +52,7 @@ find_library(HAMLIB_LIBRARY
   )
 
 include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(HAMLIB
+find_package_handle_standard_args(hamlib
   DEFAULT_MSG
   HAMLIB_LIBRARY
   HAMLIB_INCLUDE_DIR
diff --git a/cmake/modules/Findudev.cmake b/cmake/modules/Findudev.cmake
index 38ba2e2..c8c4b62 100644
--- a/cmake/modules/Findudev.cmake
+++ b/cmake/modules/Findudev.cmake
@@ -65,7 +65,7 @@ find_path(UDEV_INCLUDE_DIR
   )
 
 include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(UDEV
+find_package_handle_standard_args(udev
   DEFAULT_MSG
   UDEV_LIBRARY
   UDEV_INCLUDE_DIR