diff --git a/docs/process-capture.md b/docs/process-capture.md
index 69a39c64f..24cdac571 100644
--- a/docs/process-capture.md
+++ b/docs/process-capture.md
@@ -114,7 +114,8 @@ Port normalization recognizes explicit `port`, `tcp_port`, `udp_port`, and
 `listen` fields, URL authorities, IP endpoints, and `localhost` endpoints, with
 ports from 0 through 65535. A port may end a sentence, as in `port: 8080.`;
 a period followed by a letter or digit continues a decimal, version, or host
-name instead. It preserves ordinary counters, dimensions, file line numbers,
+name instead. Each PTY chunk is normalized on its own, so a port whose period
+ends the chunk is left unchanged because its continuation is not yet known. It preserves ordinary counters, dimensions, file line numbers,
 and ambiguous bare host labels. Use explicit literal `patterns`
 for a different application-specific spelling. Set `ports: false` to preserve
 all endpoint numbers in comparison text. Captures commit the port-normalization
diff --git a/src/process/capture/ProcessNormalization.test.ts b/src/process/capture/ProcessNormalization.test.ts
index b07a228a3..006d8bde4 100644
--- a/src/process/capture/ProcessNormalization.test.ts
+++ b/src/process/capture/ProcessNormalization.test.ts
@@ -118,6 +118,13 @@ it("normalizes ports that end a sentence but not decimal or host continuations",
   );
 });
 
+it("keeps a port before a chunk-final period, whose continuation is unknown", () => {
+  for (const chunk of ["port: 80.", "http://localhost:8080.", "[::1]:3000."])
+    expect(
+      normalizeProcessText(chunk, scenario({}), "/temporary", rootPid),
+    ).toBe(chunk);
+});
+
 it("normalizes representative process identities and preserves null, zero, and unrelated numbers", () => {
   const before = JSON.stringify(samples);
   const normalized = normalizeProcessSamples(samples, scenario({}), rootPid);
diff --git a/src/process/capture/ProcessNormalization.ts b/src/process/capture/ProcessNormalization.ts
index 27c7d1f49..8423b5dd1 100644
--- a/src/process/capture/ProcessNormalization.ts
+++ b/src/process/capture/ProcessNormalization.ts
@@ -43,9 +43,11 @@ export const normalizeProcessText = (
 
 // A port may end a sentence, but a period followed by a word character
 // continues a decimal, version, or host name and is not a port boundary.
+// PTY chunks are normalized independently, so a period that ends the chunk
+// stays unnormalized: its continuation may arrive in the next chunk.
 const normalizePortTokens = (value: string): string => {
   const endpointNormalized = value.replaceAll(
-    /(\b[a-z][a-z0-9+.-]*:\/\/[^\s/?#"'<>]+|\blocalhost|\b(?:\d{1,3}\.){3}\d{1,3}|\[[\da-f:.%]+\]):(\d{1,5})(?![\w@:]|\.\w)/giu,
+    /(\b[a-z][a-z0-9+.-]*:\/\/[^\s/?#"'<>]+|\blocalhost|\b(?:\d{1,3}\.){3}\d{1,3}|\[[\da-f:.%]+\]):(\d{1,5})(?![\w@:]|\.(?:\w|$))/giu,
     (match: string, endpoint: string, port: string) => {
       if (Number(port) > 65_535) return match;
       const isEndpoint = endpoint.includes("://")
@@ -56,7 +58,7 @@ const normalizePortTokens = (value: string): string => {
     },
   );
   return endpointNormalized.replaceAll(
-    /(\b(?:port|tcp_port|udp_port|listen)\b["']?\s*[:=]\s*)(\d{1,5})(?!\w|\.\w)/giu,
+    /(\b(?:port|tcp_port|udp_port|listen)\b["']?\s*[:=]\s*)(\d{1,5})(?!\w|\.(?:\w|$))/giu,
     (match: string, prefix: string, port: string) =>
       Number(port) <= 65_535 ? `${prefix}<port>` : match,
   );