diff --git a/src/libsysprof-profile/sysprof-spawnable.c b/src/libsysprof-profile/sysprof-spawnable.c
index 631c82ad..733b0080 100644
--- a/src/libsysprof-profile/sysprof-spawnable.c
+++ b/src/libsysprof-profile/sysprof-spawnable.c
@@ -378,3 +378,19 @@ sysprof_spawnable_add_trace_fd (SysprofSpawnable *self,
 
   return g_steal_fd (&fd);
 }
+
+void
+sysprof_spawnable_add_ld_preload (SysprofSpawnable *self,
+                                  const char       *library_path)
+{
+  g_autofree char *amended = NULL;
+  const char *val;
+
+  g_return_if_fail (SYSPROF_IS_SPAWNABLE (self));
+  g_return_if_fail (library_path != NULL);
+
+  if ((val = sysprof_spawnable_getenv (self, "LD_PRELOAD")))
+    library_path = amended = g_strdup_printf ("%s:%s", val, library_path);
+
+  sysprof_spawnable_setenv (self, "LD_PRELOAD", library_path);
+}
diff --git a/src/libsysprof-profile/sysprof-spawnable.h b/src/libsysprof-profile/sysprof-spawnable.h
index 5aca47a6..9f14b560 100644
--- a/src/libsysprof-profile/sysprof-spawnable.h
+++ b/src/libsysprof-profile/sysprof-spawnable.h
@@ -78,6 +78,9 @@ SYSPROF_AVAILABLE_IN_ALL
 int                  sysprof_spawnable_add_trace_fd    (SysprofSpawnable          *self,
                                                         const char                *envvar);
 SYSPROF_AVAILABLE_IN_ALL
+void                 sysprof_spawnable_add_ld_preload  (SysprofSpawnable          *self,
+                                                        const char                *library_path);
+SYSPROF_AVAILABLE_IN_ALL
 GSubprocess         *sysprof_spawnable_spawn           (SysprofSpawnable          *self,
                                                         GError                   **error);
 SYSPROF_AVAILABLE_IN_ALL