diff --git a/cmake/modules/FindLDAP.cmake b/cmake/modules/FindLDAP.cmake
index bc3bf86714..6dde4b8af1 100644
--- a/cmake/modules/FindLDAP.cmake
+++ b/cmake/modules/FindLDAP.cmake
@@ -80,7 +80,7 @@ if(WITH_OPENLDAP)
 					#endif
 					return 0; }" openldap_2_x)
 	if(NOT openldap_2_x)
-		message(FATAL_ERROR "At least 2.0 OpenLDAP version required")
+		message(FATAL_ERROR "At least 2.0 OpenLDAP version required; either use -DWITH_OPENLDAP=OFF argument to cmake command to disable LDAP support, or install OpenLDAP")
 	endif(NOT openldap_2_x)
 else(WITH_OPENLDAP)
 	CHECK_C_SOURCE_COMPILES("#include \"ldap.h\"
@@ -90,7 +90,7 @@ else(WITH_OPENLDAP)
 					#endif
 					return 0; }" sunldap_2_x)
 	if(NOT sunldap_2_x)
-		message(FATAL_ERROR "At least 2.0 SunLDAP version required")
+		message(FATAL_ERROR "At least 2.0 SunLDAP version required; either use -DWITH_SUNLDAP=OFF argument to cmake command to disable LDAP support, or install SunLDAP")
 	endif(NOT sunldap_2_x)
 endif(WITH_OPENLDAP)
 
@@ -121,9 +121,9 @@ if(libldap_provides_ldap_open)
 	endif(WITH_STATIC_LDAP)
 else(libldap_provides_ldap_open)
 	if(WITH_OPENLDAP)
-		message(FATAL_ERROR "Could not find OpenLDAP libraries")
+		message(FATAL_ERROR "Could not find OpenLDAP libraries; either use -DWITH_OPENLDAP=OFF argument to cmake command to disable LDAP support, or install OpenLDAP")
 	else(WITH_OPENLDAP)
-		message(FATAL_ERROR "Could not find SunLDAP libraries")
+		message(FATAL_ERROR "Could not find SunLDAP libraries; either use -DWITH_SUNLDAP=OFF argument to cmake command to disable LDAP support, or install SunLDAP")
 	endif(WITH_OPENLDAP)
 endif(libldap_provides_ldap_open)