diff --git a/ffi.nimble b/ffi.nimble
index 8312302..9e195a6 100644
--- a/ffi.nimble
+++ b/ffi.nimble
@@ -1,6 +1,6 @@
 # ffi.nimble
 
-version = "0.1.5"
+version = "0.1.6"
 author = "Institute of Free Technology"
 description = "FFI framework with custom header generation"
 license = "MIT or Apache License 2.0"
@@ -13,8 +13,8 @@ requires "chronicles"
 requires "taskpools"
 requires "cbor_serialization"
 
-const nimFlagsOrc = "--mm:orc -d:chronicles_log_level=WARN"
-const nimFlagsRefc = "--mm:refc -d:chronicles_log_level=WARN"
+const nimFlagsOrc = "--mm:orc -d:chronicles_log_level=WARN -d:ffiAllowSignalHandler"
+const nimFlagsRefc = "--mm:refc -d:chronicles_log_level=WARN -d:ffiAllowSignalHandler"
 
 import std/[algorithm, os, strutils]
 
diff --git a/ffi/ffi_context.nim b/ffi/ffi_context.nim
index 48e5e1b..c05b301 100644
--- a/ffi/ffi_context.nim
+++ b/ffi/ffi_context.nim
@@ -6,7 +6,20 @@
 
 {.passc: "-fPIC".}
 
-import std/[atomics, locks, options, tables, sequtils]
+# Embedded in a foreign host (Go/Rust/...) the host must own OS signal handling;
+# Nim installing its own handlers clobbers it (e.g. Go's SIGSEGV -> sigpanic).
+# Enforce -d:noSignalHandler; standalone Nim binaries opt out via -d:ffiAllowSignalHandler.
+when not defined(noSignalHandler) and not defined(ffiAllowSignalHandler):
+  {.
+    error:
+      "nim-ffi: missing required compile flag. If this library is embedded in a " &
+      "host process (Go/Rust/...), build with -d:noSignalHandler so the host keeps " &
+      "ownership of OS signal handlers (it needs SIGSEGV for crash recovery, stack " &
+      "growth and preemption). If instead this is a standalone Nim program that owns " &
+      "its own process, build with -d:ffiAllowSignalHandler."
+  .}
+
+import std/[atomics, locks, json, tables, sequtils]
 import chronicles, chronos, chronos/threadsync, taskpools/channels_spsc_single, results
 import ./ffi_types, ./ffi_thread_request, ./internal/ffi_macro, ./logging