diff --git a/src/core-init-ext.nix b/src/core-init-ext.nix
index bc9facd..49977e5 100644
--- a/src/core-init-ext.nix
+++ b/src/core-init-ext.nix
@@ -32,9 +32,17 @@ let
   coreInitImpl = writeText "sqlite-core-init.c" ''
     #include "${coreInitHeaders}"
     #include <sqlite3.h>
+    #include <stdio.h>
 
     int core_init(const char *dummy) {
-      ${lib.concatMapStringsSep "\n" (sym: "sqlite3_auto_extension((void(*)(void))${sym});") initSymbols}
+      int rc;
+      ${lib.concatMapStringsSep "\n" (sym: ''
+        rc = sqlite3_auto_extension((void(*)(void))${sym});
+        if (rc != SQLITE_OK) {
+          fprintf(stderr, "Failed to register auto-extension ${sym}: %d\n", rc);
+          return rc;
+        }
+      '') initSymbols}
       return SQLITE_OK;
     }