diff --git a/Dockerfile b/Dockerfile
index 9c05df2..5d2ca39 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,7 @@
 FROM php:5.6-apache
-MAINTAINER Pierre Cheynier <pierre.cheynier@gmail.com>
+
+ARG TARGETPLATFORM
+RUN echo "TARGETPLATFORM : $TARGETPLATFORM"
 
 ENV PHPIPAM_AGENT_SOURCE https://github.com/phpipam/phpipam-agent
 
@@ -15,7 +17,15 @@ RUN docker-php-ext-configure mysqli --with-mysqli=mysqlnd && \
     docker-php-ext-install mysqli && \
     docker-php-ext-install json && \
     docker-php-ext-install pdo_mysql && \
-    docker-php-ext-configure gmp  && \
+    
+    if [ "$TARGETPLATFORM" = "linux/386" ] ; then XARCH="i386-linux-gnu" ; fi && \
+    if [ "$TARGETPLATFORM" = "linux/amd64" ] ; then XARCH="x86_64-linux-gnu" ; fi && \
+    if [ "$TARGETPLATFORM" = "linux/arm/v6" ] ; then XARCH="arm-linux-gnueabi" ; fi && \
+    if [ "$TARGETPLATFORM" = "linux/arm/v7" ] ; then XARCH="arm-linux-gnueabihf" ; fi && \
+    if [ "$TARGETPLATFORM" = "linux/arm64" ] ; then XARCH="aarch64-linux-gnu" ; fi && \
+    
+    ln -s /usr/include/$XARCH/gmp.h /usr/include/gmp.h && \
+    docker-php-ext-configure gmp --with-gmp=/usr/include/$XARCH && \
     docker-php-ext-install gmp && \
     docker-php-ext-install pcntl