diff --git a/Dockerfile b/Dockerfile
index 7f031ca..a07046e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -52,7 +52,7 @@ COPY etc/snippets_common.conf /etc/nginx/snippets/snippets_common.conf
 # Try to bypass Alpine Linux iconv bug
 #RUN apk add --no-cache --repository http://dl-cdn.alpinelinux.org/alpine/edge/community/ gnu-libiconv
 RUN apk add --no-cache --repository http://dl-cdn.alpinelinux.org/alpine/v3.12/community/ gnu-libiconv=1.15-r2
-ENV LD_PRELOAD /usr/lib/preloadable_libiconv.so
+ENV LD_PRELOAD=/usr/lib/preloadable_libiconv.so
 
 # Use PHP 8.3 release
 ENV VER_PHP=php83