diff --git a/Dockerfile-71-fpm b/Dockerfile-71-fpm
index f2f803b..6811af4 100644
--- a/Dockerfile-71-fpm
+++ b/Dockerfile-71-fpm
@@ -32,6 +32,11 @@ RUN apt-get update && \
     libmcrypt-dev \
   && rm -rf /var/lib/apt/lists/*
 
+# Error: configure: error: freetype-config not found.
+# Fix: apt-get install libfreetype6-dev
+# Ref: https://jcutrer.com/linux/how-to-compile-php7-on-ubuntu-14-04
+RUN apt-get install libfreetype6-dev
+
 # Install the PHP mcrypt extention
 RUN docker-php-ext-install mcrypt \
   # Install the PHP pdo_mysql extention