diff --git a/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/JdbcSessionDatabaseInitializer.java b/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/JdbcSessionDatabaseInitializer.java
index a1d94dd96a..96aecc69fc 100644
--- a/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/JdbcSessionDatabaseInitializer.java
+++ b/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/JdbcSessionDatabaseInitializer.java
@@ -45,7 +45,6 @@ public class JdbcSessionDatabaseInitializer {
 		aliases.put("apache derby", "derby");
 		aliases.put("hsql database engine", "hsqldb");
 		aliases.put("microsoft sql server", "sqlserver");
-		aliases.put("postgres", "postgresql");
 		ALIASES = Collections.unmodifiableMap(aliases);
 	}