diff --git a/src/collections.c b/src/collections.c
index 0c00a03..88d7c46 100644
--- a/src/collections.c
+++ b/src/collections.c
@@ -22,6 +22,8 @@ zend_class_entry* collections_pair_ce;
 zend_string* collections_pair_first;
 zend_string* collections_pair_second;
 
+ZEND_DECLARE_MODULE_GLOBALS(collections)
+
 PHP_MINIT_FUNCTION(collections)
 {
     collections_pair_first = zend_string_init("first", sizeof "first" - 1, 1);
diff --git a/src/collections_methods.c b/src/collections_methods.c
index f0c9a2c..08853ba 100644
--- a/src/collections_methods.c
+++ b/src/collections_methods.c
@@ -123,6 +123,9 @@
         return;                                                            \
     }
 
+#define FCI_G    COLLECTIONS_G(fci)
+#define FCC_G    COLLECTIONS_G(fcc)
+
 /// Unused global variable.
 zval rv;
 
diff --git a/src/php_collections.h b/src/php_collections.h
index a5d4bdc..896ef30 100644
--- a/src/php_collections.h
+++ b/src/php_collections.h
@@ -25,6 +25,22 @@ extern zend_module_entry collections_module_entry;
 #define GC_DELREF(p) --GC_REFCOUNT(p)
 #endif
 
+ZEND_BEGIN_MODULE_GLOBALS(collections)
+    zend_fcall_info* fci;
+    zend_fcall_info_cache* fcc;
+ZEND_END_MODULE_GLOBALS(collections)
+
+ZEND_EXTERN_MODULE_GLOBALS(collections)
+
+#ifdef ZTS
+#ifdef COMPILE_DL_COLLECTIONS
+ZEND_TSRMLS_CACHE_EXTERN()
+#endif
+#define COLLECTIONS_G(v) TSRMG(collections_globals_id, zend_collections_globals*, v)
+#else
+#define COLLECTIONS_G(v) (collections_globals.v)
+#endif
+
 extern PHP_COLLECTIONS_API zend_class_entry* collections_collection_ce;
 extern PHP_COLLECTIONS_API zend_class_entry* collections_pair_ce;