diff --git a/Zend/zend_map_ptr.h b/Zend/zend_map_ptr.h
index f2fe96f19a7..aa726e0cdd3 100644
--- a/Zend/zend_map_ptr.h
+++ b/Zend/zend_map_ptr.h
@@ -69,9 +69,13 @@
 # error "Unknown ZEND_MAP_PTR_KIND"
 #endif
 
+BEGIN_EXTERN_C()
+
 ZEND_API void  zend_map_ptr_reset(void);
 ZEND_API void *zend_map_ptr_new(void);
 ZEND_API void  zend_map_ptr_extend(size_t last);
 ZEND_API void zend_alloc_ce_cache(zend_string *type_name);
 
+END_EXTERN_C()
+
 #endif /* ZEND_MAP_PTR_H */
diff --git a/ext/opcache/ZendAccelerator.h b/ext/opcache/ZendAccelerator.h
index 9d18493c7d5..bd692495a52 100644
--- a/ext/opcache/ZendAccelerator.h
+++ b/ext/opcache/ZendAccelerator.h
@@ -311,6 +311,8 @@ extern zend_accel_globals accel_globals;
 
 extern char *zps_api_failure_reason;
 
+BEGIN_EXTERN_C()
+
 void accel_shutdown(void);
 zend_result  accel_activate(INIT_FUNC_ARGS);
 zend_result accel_post_deactivate(void);
@@ -333,6 +335,8 @@ zend_string* ZEND_FASTCALL accel_new_interned_string(zend_string *str);
 
 uint32_t zend_accel_get_class_name_map_ptr(zend_string *type_name);
 
+END_EXTERN_C()
+
 /* memory write protection */
 #define SHM_PROTECT() \
 	do { \
diff --git a/ext/opcache/zend_accelerator_hash.h b/ext/opcache/zend_accelerator_hash.h
index 7cf995f3175..755d3f13ec5 100644
--- a/ext/opcache/zend_accelerator_hash.h
+++ b/ext/opcache/zend_accelerator_hash.h
@@ -60,6 +60,8 @@ typedef struct _zend_accel_hash {
 	uint32_t               num_direct_entries;
 } zend_accel_hash;
 
+BEGIN_EXTERN_C()
+
 void zend_accel_hash_init(zend_accel_hash *accel_hash, uint32_t hash_size);
 void zend_accel_hash_clean(zend_accel_hash *accel_hash);
 
@@ -90,4 +92,6 @@ static inline bool zend_accel_hash_is_full(zend_accel_hash *accel_hash)
 	}
 }
 
+END_EXTERN_C()
+
 #endif /* ZEND_ACCELERATOR_HASH_H */
diff --git a/ext/opcache/zend_accelerator_util_funcs.h b/ext/opcache/zend_accelerator_util_funcs.h
index 1ce661635c1..53cc1de9eff 100644
--- a/ext/opcache/zend_accelerator_util_funcs.h
+++ b/ext/opcache/zend_accelerator_util_funcs.h
@@ -25,6 +25,8 @@
 #include "zend.h"
 #include "ZendAccelerator.h"
 
+BEGIN_EXTERN_C()
+
 zend_persistent_script* create_persistent_script(void);
 void free_persistent_script(zend_persistent_script *persistent_script, int destroy_elements);
 
@@ -42,4 +44,6 @@ unsigned int zend_adler32(unsigned int checksum, unsigned char *buf, uint32_t le
 
 unsigned int zend_accel_script_checksum(zend_persistent_script *persistent_script);
 
+END_EXTERN_C()
+
 #endif /* ZEND_ACCELERATOR_UTIL_FUNCS_H */
diff --git a/ext/opcache/zend_shared_alloc.h b/ext/opcache/zend_shared_alloc.h
index 4e090b98dda..56c2da5e90e 100644
--- a/ext/opcache/zend_shared_alloc.h
+++ b/ext/opcache/zend_shared_alloc.h
@@ -125,6 +125,8 @@ extern zend_smm_shared_globals *smm_shared_globals;
 
 #define SHARED_ALLOC_REATTACHED		(SUCCESS+1)
 
+BEGIN_EXTERN_C()
+
 int zend_shared_alloc_startup(size_t requested_size, size_t reserved_size);
 void zend_shared_alloc_shutdown(void);
 
@@ -200,4 +202,6 @@ void zend_shared_alloc_lock_win32(void);
 void zend_shared_alloc_unlock_win32(void);
 #endif
 
+END_EXTERN_C()
+
 #endif /* ZEND_SHARED_ALLOC_H */