diff --git a/module/advanced-scene-switcher-module.c b/module/advanced-scene-switcher-module.c
index 038766bd..5ba4c426 100644
--- a/module/advanced-scene-switcher-module.c
+++ b/module/advanced-scene-switcher-module.c
@@ -1,13 +1,19 @@
 #include <obs-module.h>
 #include <obs-frontend-api.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #ifdef _WIN32
+#include <process.h>
 #define ADVSS_SETENV(k, v) _putenv_s(k, v)
 #define ADVSS_UNSETENV(k) _putenv_s(k, "")
+#define ADVSS_GETPID() _getpid()
 #else
+#include <unistd.h>
 #define ADVSS_SETENV(k, v) setenv(k, v, 1)
 #define ADVSS_UNSETENV(k) unsetenv(k)
+#define ADVSS_GETPID() getpid()
 #endif
 
 #define ADVSS_INSTANCE_ENV "ADVSS_INSTANCE_LOADED"
@@ -28,12 +34,16 @@ void obs_module_post_load(void)
 
 bool obs_module_load(void)
 {
-	if (getenv(ADVSS_INSTANCE_ENV)) {
+	char pid[32];
+	snprintf(pid, sizeof(pid), "%d", (int)ADVSS_GETPID());
+
+	const char *loadedPid = getenv(ADVSS_INSTANCE_ENV);
+	if (loadedPid && strcmp(loadedPid, pid) == 0) {
 		blog(LOG_WARNING,
 		     "[adv-ss] Another instance is already loaded - skipping.");
 		return false;
 	}
-	ADVSS_SETENV(ADVSS_INSTANCE_ENV, "1");
+	ADVSS_SETENV(ADVSS_INSTANCE_ENV, pid);
 	obs_frontend_push_ui_translation(obs_module_get_string);
 	InitSceneSwitcher(obs_current_module(), obs_module_text);
 	return true;