diff --git a/java/openjdk21/Makefile b/java/openjdk21/Makefile
index a752ae715ba7..7412543ec05a 100644
--- a/java/openjdk21/Makefile
+++ b/java/openjdk21/Makefile
@@ -122,8 +122,8 @@ BOOTSTRAPJDKDIR=	${BJDK}
 
 # if no valid jdk found, set dependency
 .if !defined(BOOTSTRAPJDKDIR)
-BOOTSTRAPJDKDIR?=	${LOCALBASE}/openjdk19
-BUILD_DEPENDS+=		${BOOTSTRAPJDKDIR}/bin/javac:java/openjdk19
+BOOTSTRAPJDKDIR?=	${LOCALBASE}/openjdk20
+BUILD_DEPENDS+=		${BOOTSTRAPJDKDIR}/bin/javac:java/openjdk20
 .endif
 
 JDK_BUILD_JVM=	server