diff --git a/loader.c b/loader.c
index 52dfe17..8c0ed4d 100644
--- a/loader.c
+++ b/loader.c
@@ -212,6 +212,13 @@ OBJC_PUBLIC void __objc_load(struct objc_init *init)
 		case NewABI:
 			break;
 	}
+
+	// If we've already loaded this module, don't load it again.
+	if (init->version == ULONG_MAX)
+	{
+		return;
+	}
+
 	assert(init->version == 0);
 	assert((((uintptr_t)init->sel_end-(uintptr_t)init->sel_begin) % sizeof(*init->sel_begin)) == 0);
 	assert((((uintptr_t)init->cls_end-(uintptr_t)init->cls_begin) % sizeof(*init->cls_begin)) == 0);
@@ -315,7 +322,7 @@ OBJC_PUBLIC void __objc_load(struct objc_init *init)
 		}
 	}
 #endif
-	init->version = 0xffffffffffffffffULL;
+	init->version = ULONG_MAX;
 }
 
 #ifdef OLDABI_COMPAT