diff --git a/master/master.cfg b/master/master.cfg
index df73dbe..d3d3f33 100644
--- a/master/master.cfg
+++ b/master/master.cfg
@@ -88,15 +88,18 @@ LLVM_BRANCHES = {LLVM_MAIN: VersionedBranch(ref='main', version=Version(20, 0, 0
 # (Note that there are older releases of Halide that we no longer bother to build/test regularly.)
 
 HALIDE_MAIN = 'main'
+HALIDE_RELEASE_19 = 'release_19'
 HALIDE_RELEASE_18 = 'release_18'
 HALIDE_RELEASE_17 = 'release_17'
 
 _HALIDE_RELEASES = [
+    HALIDE_RELEASE_19,
     HALIDE_RELEASE_18,
     HALIDE_RELEASE_17,
 ]
 
 HALIDE_BRANCHES = {HALIDE_MAIN: VersionedBranch(ref='main', version=Version(19, 0, 0)),
+                   HALIDE_RELEASE_19: VersionedBranch(ref='release/19.x', version=Version(19, 0, 0)),
                    HALIDE_RELEASE_18: VersionedBranch(ref='release/18.x', version=Version(18, 0, 0)),
                    HALIDE_RELEASE_17: VersionedBranch(ref='release/17.x', version=Version(17, 0, 2))}
 
@@ -111,6 +114,7 @@ HALIDE_NIGHTLIES = [HALIDE_MAIN, HALIDE_RELEASE_18, HALIDE_RELEASE_17]
 # halide main, it's llvm main.
 LLVM_FOR_HALIDE = {
     HALIDE_MAIN: [LLVM_MAIN, LLVM_RELEASE_19, LLVM_RELEASE_18],
+    HALIDE_RELEASE_19: [LLVM_RELEASE_19],
     HALIDE_RELEASE_18: [LLVM_RELEASE_18],
     HALIDE_RELEASE_17: [LLVM_RELEASE_17],
 }