diff --git a/Zend/zend.c b/Zend/zend.c
index d5a933b47cd03..f429b2d2a4ce5 100644
--- a/Zend/zend.c
+++ b/Zend/zend.c
@@ -223,13 +223,13 @@ ZEND_API int zend_make_printable_zval(zval *expr, zval *expr_copy TSRMLS_DC) /*
 }
 /* }}} */
 
-ZEND_API int zend_print_zval(zval *expr, int indent TSRMLS_DC) /* {{{ */
+ZEND_API size_t zend_print_zval(zval *expr, int indent TSRMLS_DC) /* {{{ */
 {
 	return zend_print_zval_ex(zend_write, expr, indent TSRMLS_CC);
 }
 /* }}} */
 
-ZEND_API int zend_print_zval_ex(zend_write_func_t write_func, zval *expr, int indent TSRMLS_DC) /* {{{ */
+ZEND_API size_t zend_print_zval_ex(zend_write_func_t write_func, zval *expr, int indent TSRMLS_DC) /* {{{ */
 {
 	zend_string *str = zval_get_string(expr);
 	size_t len = str->len;
@@ -793,7 +793,7 @@ void zend_shutdown(TSRMLS_D) /* {{{ */
 void zend_set_utility_values(zend_utility_values *utility_values) /* {{{ */
 {
 	zend_uv = *utility_values;
-	zend_uv.import_use_extension_length = strlen(zend_uv.import_use_extension);
+	zend_uv.import_use_extension_length = (uint)strlen(zend_uv.import_use_extension);
 }
 /* }}} */
 
@@ -827,11 +827,11 @@ ZEND_API void zend_append_version_info(const zend_extension *extension) /* {{{ *
 	char *new_info;
 	uint new_info_length;
 
-	new_info_length = sizeof("    with  v, , by \n")
+	new_info_length = (uint)(sizeof("    with  v, , by \n")
 						+ strlen(extension->name)
 						+ strlen(extension->version)
 						+ strlen(extension->copyright)
-						+ strlen(extension->author);
+						+ strlen(extension->author));
 
 	new_info = (char *) malloc(new_info_length + 1);
 
@@ -1097,7 +1097,7 @@ static void zend_error_va_list(int type, const char *format, va_list args)
 # endif
 #endif
 			va_copy(usr_copy, args);
-			len = zend_vspprintf(&str, 0, format, usr_copy);
+			len = (int)zend_vspprintf(&str, 0, format, usr_copy);
 			ZVAL_NEW_STR(&params[1], zend_string_init(str, len, 0));
 			efree(str);
 #ifdef va_copy
diff --git a/Zend/zend.h b/Zend/zend.h
index 969fa5e71beee..b5de33fb43887 100644
--- a/Zend/zend.h
+++ b/Zend/zend.h
@@ -197,7 +197,7 @@ typedef struct _zend_utility_values {
 	zend_bool html_errors;
 } zend_utility_values;
 
-typedef int (*zend_write_func_t)(const char *str, uint str_length);
+typedef int (*zend_write_func_t)(const char *str, size_t str_length);
 
 #define zend_bailout()		_zend_bailout(__FILE__, __LINE__)
 
@@ -228,8 +228,8 @@ ZEND_API void _zend_bailout(char *filename, uint lineno);
 
 ZEND_API char *get_zend_version(void);
 ZEND_API int zend_make_printable_zval(zval *expr, zval *expr_copy TSRMLS_DC);
-ZEND_API int zend_print_zval(zval *expr, int indent TSRMLS_DC);
-ZEND_API int zend_print_zval_ex(zend_write_func_t write_func, zval *expr, int indent TSRMLS_DC);
+ZEND_API size_t zend_print_zval(zval *expr, int indent TSRMLS_DC);
+ZEND_API size_t zend_print_zval_ex(zend_write_func_t write_func, zval *expr, int indent TSRMLS_DC);
 ZEND_API void zend_print_zval_r(zval *expr, int indent TSRMLS_DC);
 ZEND_API void zend_print_flat_zval_r(zval *expr TSRMLS_DC);
 ZEND_API void zend_print_zval_r_ex(zend_write_func_t write_func, zval *expr, int indent TSRMLS_DC);
diff --git a/ext/standard/var.c b/ext/standard/var.c
index 6e5bd703d36ec..4d00a4ab2f9ed 100644
--- a/ext/standard/var.c
+++ b/ext/standard/var.c
@@ -389,7 +389,7 @@ PHP_FUNCTION(debug_zval_dump)
 #define buffer_append_spaces(buf, num_spaces) \
 	do { \
 		char *tmp_spaces; \
-		int tmp_spaces_len; \
+		size_t tmp_spaces_len; \
 		tmp_spaces_len = spprintf(&tmp_spaces, 0,"%*c", num_spaces, ' '); \
 		smart_str_appendl(buf, tmp_spaces, tmp_spaces_len); \
 		efree(tmp_spaces); \