diff --git a/libs/esl/php/Makefile b/libs/esl/php/Makefile
index 3095ea2d29..44fdd22dae 100644
--- a/libs/esl/php/Makefile
+++ b/libs/esl/php/Makefile
@@ -27,4 +27,4 @@ reswig:	swigclean esl_wrap.cpp
 install: ESL.so
 	cp ESL.so $(shell php-config --extension-dir)
 	cp ESL.php $(shell php -r 'echo ini_get("include_path");' | cut -d: -f2)
-	echo 'extension=ESL.so' > $(shell php-config --configure-options | tr " " "\n" | grep -- --with-config-file-scan-dir | cut -f2 -d=)/esl.ini
+	echo 'extension=ESL.so' >> $(shell php-config --configure-options | tr " " "\n" | grep -- --with-config-file-scan-dir | cut -f2 -d=)/esl.ini