diff --git a/jOOQ/src/main/java/org/jooq/ParserCLI.java b/jOOQ/src/main/java/org/jooq/ParserCLI.java
index 31276ca063..fd8e05e1ba 100644
--- a/jOOQ/src/main/java/org/jooq/ParserCLI.java
+++ b/jOOQ/src/main/java/org/jooq/ParserCLI.java
@@ -73,7 +73,7 @@ public final class ParserCLI {
         }
         else if (a.done) {}
         else if (a.toDialect == null || a.sql == null) {
-            System.out.println("Mandatory arguments: -t and -s. Use -h for help");
+            System.out.println("Mandatory arguments: -T and -s. Use -h for help");
             throw new RuntimeException();
         }
         else {
@@ -149,7 +149,7 @@ public final class ParserCLI {
                                     invalid(arg, RenderNameCase.class);
                                 }
                             }
-                            else if ("f".equals(flag) || "from-dialect".equals(flag)) {
+                            else if ("F".equals(flag) || "from-dialect".equals(flag)) {
                                 try {
                                     a.fromDialect = SQLDialect.valueOf(arg.toUpperCase());
                                     displayFromDialect(a);
@@ -158,7 +158,9 @@ public final class ParserCLI {
                                     invalid(arg, SQLDialect.class);
                                 }
                             }
-                            else if ("t".equals(flag) || "to-dialect".equals(flag)) {
+
+                            // [#9144] /t maintained for backwards compatibility
+                            else if ("t".equals(flag) || "T".equals(flag) || "to-dialect".equals(flag)) {
                                 try {
                                     a.toDialect = SQLDialect.valueOf(arg.toUpperCase());
                                     displayToDialect(a);
@@ -290,7 +292,7 @@ public final class ParserCLI {
                     throw e;
                 }
             }
-            else if ("-f".equals(args[i]) || "--from-dialect".equals(args[i])) {
+            else if ("-F".equals(args[i]) || "--from-dialect".equals(args[i])) {
                 try {
                     result.fromDialect = SQLDialect.valueOf(args[++i].toUpperCase());
                     continue argsLoop;
@@ -300,11 +302,13 @@ public final class ParserCLI {
                     throw e;
                 }
                 catch (ArrayIndexOutOfBoundsException e) {
-                    System.out.println("Flag -f / --from-dialect requires <SQLDialect> argument");
+                    System.out.println("Flag -F / --from-dialect requires <SQLDialect> argument");
                     throw e;
                 }
             }
-            else if ("-t".equals(args[i]) || "--to-dialect".equals(args[i])) {
+
+            // [#9144] -t maintained for backwards compatibility
+            else if ("-t".equals(args[i]) || "-T".equals(args[i]) || "--to-dialect".equals(args[i])) {
                 try {
                     result.toDialect = SQLDialect.valueOf(args[++i].toUpperCase());
                     continue argsLoop;
@@ -314,7 +318,7 @@ public final class ParserCLI {
                     throw e;
                 }
                 catch (ArrayIndexOutOfBoundsException e) {
-                    System.out.println("Flag -t / --to-dialect requires <SQLDialect> argument");
+                    System.out.println("Flag -T / --to-dialect requires <SQLDialect> argument");
                     throw e;
                 }
             }
@@ -358,8 +362,8 @@ public final class ParserCLI {
         System.out.println("  -h / --help                             Display this help");
         System.out.println("  -k / --keyword      <RenderKeywordCase> Specify the output keyword case (org.jooq.conf.RenderKeywordCase)");
         System.out.println("  -i / --identifier   <RenderNameCase>    Specify the output identifier case (org.jooq.conf.RenderNameCase)");
-        System.out.println("  -f / --from-dialect <SQLDialect>        Specify the input dialect (org.jooq.SQLDialect)");
-        System.out.println("  -t / --to-dialect   <SQLDialect>        Specify the output dialect (org.jooq.SQLDialect)");
+        System.out.println("  -F / --from-dialect <SQLDialect>        Specify the input dialect (org.jooq.SQLDialect)");
+        System.out.println("  -T / --to-dialect   <SQLDialect>        Specify the output dialect (org.jooq.SQLDialect)");
         System.out.println("  -s / --sql          <String>            Specify the input SQL string");
         System.out.println("");
         System.out.println("  -I / --interactive                      Start interactive mode");
@@ -372,8 +376,8 @@ public final class ParserCLI {
         System.out.println("  /h  or  /help                             Display this help");
         System.out.println("  /k  or  /keyword      <RenderKeywordCase> Specify the output keyword case (org.jooq.conf.RenderKeywordCase)");
         System.out.println("  /i  or  /identifier   <RenderNameCase>    Specify the output identifier case (org.jooq.conf.RenderNameCase)");
-        System.out.println("  /f  or  /from-dialect <SQLDialect>        Specify the input dialect (org.jooq.SQLDialect)");
-        System.out.println("  /t  or  /to-dialect   <SQLDialect>        Specify the output dialect (org.jooq.SQLDialect)");
+        System.out.println("  /F  or  /from-dialect <SQLDialect>        Specify the input dialect (org.jooq.SQLDialect)");
+        System.out.println("  /T  or  /to-dialect   <SQLDialect>        Specify the output dialect (org.jooq.SQLDialect)");
         System.out.println("                        <String>            Specify the input SQL string");
         System.out.println("");
         System.out.println("  /q  or  /quit                             Quit");