diff --git a/libgeotiff/cmake/project-config-version.cmake.in b/libgeotiff/cmake/project-config-version.cmake.in
index d695aa2..efe32ba 100644
--- a/libgeotiff/cmake/project-config-version.cmake.in
+++ b/libgeotiff/cmake/project-config-version.cmake.in
@@ -5,14 +5,14 @@ set (PACKAGE_VERSION_MAJOR "@PROJECT_VERSION_MAJOR@")
 set (PACKAGE_VERSION_MINOR "@PROJECT_VERSION_MINOR@")
 set (PACKAGE_VERSION_PATCH "@PROJECT_VERSION_PATCH@")
 
-if (NOT PACKAGE_FIND_NAME STREQUAL "@PROJECT_NAME@")
+if (NOT PACKAGE_FIND_NAME STREQUAL "@PROJECT_NAME_LOWER@")
   # Check package name (in particular, because of the way cmake finds
   # package config files, the capitalization could easily be "wrong").
   # This is necessary to ensure that the automatically generated
   # variables, e.g., <package>_FOUND, are consistently spelled.  Make
   # this a WARNING, because this is a user error that needs to be fixed.
   message (WARNING
-    "Mismatched package names: use find_package(@PROJECT_NAME@ ...) instead"
+    "Mismatched package names: use find_package(@PROJECT_NAME_LOWER@ ...) instead"
     " of find_package(${PACKAGE_FIND_NAME} ...)")
   set (PACKAGE_VERSION_UNSUITABLE TRUE)
 elseif (NOT (APPLE OR CMAKE_SIZEOF_VOID_P EQUAL @CMAKE_SIZEOF_VOID_P@))