diff --git a/src/transformation/utils/diagnostics.ts b/src/transformation/utils/diagnostics.ts
index 5fb1bf15e..1fb9547e6 100644
--- a/src/transformation/utils/diagnostics.ts
+++ b/src/transformation/utils/diagnostics.ts
@@ -82,7 +82,7 @@ export const unsupportedAccessorInObjectLiteral = createErrorDiagnosticFactory(
 );
 
 export const unsupportedRightShiftOperator = createErrorDiagnosticFactory(
-    "Right shift operator is not supported for target Lua 5.3. Use `>>>` instead."
+    "Signed right shift `>>` is not supported on Lua 5.3+: Lua's native `>>` is logical (zero-fill) on 64-bit integers, with no built-in arithmetic shift. Use `>>>` if you don't need sign extension, or write your own helper."
 );
 
 const getLuaTargetName = (version: LuaTarget) => (version === LuaTarget.LuaJIT ? "LuaJIT" : `Lua ${version}`);
diff --git a/test/unit/__snapshots__/expressions.spec.ts.snap b/test/unit/__snapshots__/expressions.spec.ts.snap
index 720f7014e..7eeb5961a 100644
--- a/test/unit/__snapshots__/expressions.spec.ts.snap
+++ b/test/unit/__snapshots__/expressions.spec.ts.snap
@@ -756,7 +756,7 @@ ____exports.__result = a
 return ____exports"
 `;
 
-exports[`Unsupported bitop 5.3 ("a>>=b"): diagnostics 1`] = `"main.ts(1,25): error TSTL: Right shift operator is not supported for target Lua 5.3. Use \`>>>\` instead."`;
+exports[`Unsupported bitop 5.3 ("a>>=b"): diagnostics 1`] = `"main.ts(1,25): error TSTL: Signed right shift \`>>\` is not supported on Lua 5.3+: Lua's native \`>>\` is logical (zero-fill) on 64-bit integers, with no built-in arithmetic shift. Use \`>>>\` if you don't need sign extension, or write your own helper."`;
 
 exports[`Unsupported bitop 5.3 ("a>>b"): code 1`] = `
 "local ____exports = {}
@@ -764,7 +764,7 @@ ____exports.__result = a >> b
 return ____exports"
 `;
 
-exports[`Unsupported bitop 5.3 ("a>>b"): diagnostics 1`] = `"main.ts(1,25): error TSTL: Right shift operator is not supported for target Lua 5.3. Use \`>>>\` instead."`;
+exports[`Unsupported bitop 5.3 ("a>>b"): diagnostics 1`] = `"main.ts(1,25): error TSTL: Signed right shift \`>>\` is not supported on Lua 5.3+: Lua's native \`>>\` is logical (zero-fill) on 64-bit integers, with no built-in arithmetic shift. Use \`>>>\` if you don't need sign extension, or write your own helper."`;
 
 exports[`Unsupported bitop 5.4 ("a>>=b"): code 1`] = `
 "local ____exports = {}
@@ -773,7 +773,7 @@ ____exports.__result = a
 return ____exports"
 `;
 
-exports[`Unsupported bitop 5.4 ("a>>=b"): diagnostics 1`] = `"main.ts(1,25): error TSTL: Right shift operator is not supported for target Lua 5.3. Use \`>>>\` instead."`;
+exports[`Unsupported bitop 5.4 ("a>>=b"): diagnostics 1`] = `"main.ts(1,25): error TSTL: Signed right shift \`>>\` is not supported on Lua 5.3+: Lua's native \`>>\` is logical (zero-fill) on 64-bit integers, with no built-in arithmetic shift. Use \`>>>\` if you don't need sign extension, or write your own helper."`;
 
 exports[`Unsupported bitop 5.4 ("a>>b"): code 1`] = `
 "local ____exports = {}
@@ -781,4 +781,4 @@ ____exports.__result = a >> b
 return ____exports"
 `;
 
-exports[`Unsupported bitop 5.4 ("a>>b"): diagnostics 1`] = `"main.ts(1,25): error TSTL: Right shift operator is not supported for target Lua 5.3. Use \`>>>\` instead."`;
+exports[`Unsupported bitop 5.4 ("a>>b"): diagnostics 1`] = `"main.ts(1,25): error TSTL: Signed right shift \`>>\` is not supported on Lua 5.3+: Lua's native \`>>\` is logical (zero-fill) on 64-bit integers, with no built-in arithmetic shift. Use \`>>>\` if you don't need sign extension, or write your own helper."`;