diff --git a/src/deploy/functions/backend.ts b/src/deploy/functions/backend.ts
index 6d43388278c..07aa7d401c8 100644
--- a/src/deploy/functions/backend.ts
+++ b/src/deploy/functions/backend.ts
@@ -170,8 +170,24 @@ export const AllIngressSettings: IngressSettings[] = [
   "ALLOW_INTERNAL_ONLY",
   "ALLOW_INTERNAL_AND_GCLB",
 ];
-export type MemoryOptions = 128 | 256 | 512 | 1024 | 2048 | 4096 | 8192 | 16384 | 32768;
-const allMemoryOptions: MemoryOptions[] = [128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768];
+export type MemoryOptions =
+  | 128
+  | 256
+  | 512
+  | 1024
+  | 1536
+  | 2048
+  | 3072
+  | 4096
+  | 8192
+  | 16384
+  | 32768;
+const allMemoryOptions: MemoryOptions[] = [
+  128, 256, 512, 1024, 1536, 2048, 3072, 4096, 8192, 16384, 32768,
+];
+export const GCFV1_MEMORY_OPTIONS: MemoryOptions[] = [
+  128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768,
+];
 
 /**
  * Is a given number a valid MemoryOption?
@@ -180,6 +196,10 @@ export function isValidMemoryOption(mem: unknown): mem is MemoryOptions {
   return allMemoryOptions.includes(mem as MemoryOptions);
 }
 
+export function isValidGcfv1MemoryOption(mem: unknown): mem is MemoryOptions {
+  return GCFV1_MEMORY_OPTIONS.includes(mem as MemoryOptions);
+}
+
 export function isValidEgressSetting(egress: unknown): egress is VpcEgressSettings {
   return egress === "PRIVATE_RANGES_ONLY" || egress === "ALL_TRAFFIC";
 }
@@ -201,7 +221,9 @@ export function memoryOptionDisplayName(option: MemoryOptions): string {
     256: "256MB",
     512: "512MB",
     1024: "1GB",
+    1536: "1.5GB",
     2048: "2GB",
+    3072: "3GB",
     4096: "4GB",
     8192: "8GB",
     16384: "16GB",
@@ -222,7 +244,9 @@ export function memoryToGen1Cpu(memory: MemoryOptions): number {
     256: 0.1666, // ~1/6
     512: 0.3333, // ~1/3
     1024: 0.5833, // ~5/7
+    1536: 0.8,
     2048: 1,
+    3072: 1.5,
     4096: 2,
     8192: 2,
     16384: 4,
@@ -241,7 +265,9 @@ export function memoryToGen2Cpu(memory: MemoryOptions): number {
     256: 1,
     512: 1,
     1024: 1,
+    1536: 1,
     2048: 1,
+    3072: 2,
     4096: 2,
     8192: 2,
     16384: 4,
diff --git a/src/deploy/functions/build.ts b/src/deploy/functions/build.ts
index 0a1362d78dd..d9ccb6155c8 100644
--- a/src/deploy/functions/build.ts
+++ b/src/deploy/functions/build.ts
@@ -205,8 +205,21 @@ export interface SecretEnvVar {
   projectId: string; // The project containing the Secret
 }
 
-export type MemoryOption = 128 | 256 | 512 | 1024 | 2048 | 4096 | 8192 | 16384 | 32768;
-const allMemoryOptions: MemoryOption[] = [128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768];
+export type MemoryOption =
+  | 128
+  | 256
+  | 512
+  | 1024
+  | 1536
+  | 2048
+  | 3072
+  | 4096
+  | 8192
+  | 16384
+  | 32768;
+const allMemoryOptions: MemoryOption[] = [
+  128, 256, 512, 1024, 1536, 2048, 3072, 4096, 8192, 16384, 32768,
+];
 
 // Run is an automatic migration from gcfv2 and is not used on the wire.
 export type FunctionsPlatform = Exclude<backend.FunctionsPlatform, "run">;
diff --git a/src/deploy/functions/validate.spec.ts b/src/deploy/functions/validate.spec.ts
index c0ddc527cc5..128558ec24f 100644
--- a/src/deploy/functions/validate.spec.ts
+++ b/src/deploy/functions/validate.spec.ts
@@ -135,6 +135,16 @@ describe("validate", () => {
       expect(() => validate.endpointsAreValid(backend.of(ep))).to.throw(/GCF gen 1/);
     });
 
+    it("disallows unsupported memory for GCF gen 1", () => {
+      const ep: backend.Endpoint = {
+        ...ENDPOINT_BASE,
+        platform: "gcfv1",
+        availableMemoryMb: 1536,
+      };
+
+      expect(() => validate.endpointsAreValid(backend.of(ep))).to.throw(/only supports/);
+    });
+
     it("Disallows concurrency for low-CPU gen 2", () => {
       const ep: backend.Endpoint = {
         ...ENDPOINT_BASE,
@@ -289,7 +299,7 @@ describe("validate", () => {
       });
     }
 
-    for (const mem of [128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768] as const) {
+    for (const mem of [128, 256, 512, 1024, 1536, 2048, 3072, 4096, 8192, 16384, 32768] as const) {
       it(`allows gcfv2 endpoints with mem ${mem} and no cpu`, () => {
         const ep: backend.Endpoint = {
           ...ENDPOINT_BASE,
diff --git a/src/deploy/functions/validate.ts b/src/deploy/functions/validate.ts
index 05afe30b5ad..d75d6188dcf 100644
--- a/src/deploy/functions/validate.ts
+++ b/src/deploy/functions/validate.ts
@@ -37,6 +37,21 @@ export function endpointsAreValid(wantBackend: backend.Backend): void {
   }
 
   // Our SDK doesn't let people articulate this, but it's theoretically possible in the manifest syntax.
+  const gcfV1WithUnsupportedMemory = matchingIds(
+    endpoints,
+    (endpoint) =>
+      endpoint.platform === "gcfv1" &&
+      endpoint.availableMemoryMb !== undefined &&
+      endpoint.availableMemoryMb !== null &&
+      !backend.isValidGcfv1MemoryOption(endpoint.availableMemoryMb),
+  );
+  if (gcfV1WithUnsupportedMemory.length) {
+    const msg = `Cannot set availableMemoryMb on the functions ${gcfV1WithUnsupportedMemory} because GCF gen 1 only supports ${backend.GCFV1_MEMORY_OPTIONS.join(
+      ", ",
+    )} MB`;
+    throw new FirebaseError(msg);
+  }
+
   const gcfV1WithConcurrency = matchingIds(
     endpoints,
     (endpoint) => (endpoint.concurrency || 1) !== 1 && endpoint.platform === "gcfv1",