diff --git a/configure.in b/configure.in
index ce4b838..3e72b41 100644
--- a/configure.in
+++ b/configure.in
@@ -96,6 +96,12 @@ PKG_PROG_PKG_CONFIG
 
 # libraries
 case $host in
+  (*mac*|*darwin*)
+    PKG_CHECK_MODULES([PROXY], [libproxy-1.0],
+                      [LIBS+=" ${PROXY_LIBS}"
+                       CXXFLAGS+=" ${PROXY_CFLAGS}"
+                       have_proxy=1])
+    ;;
   (*mingw*|*win*)
     LIBS+=" -lwinhttp"
     CPPFLAGS+=" -DQ_OS_WIN32"
@@ -104,7 +110,6 @@ case $host in
     PKG_CHECK_MODULES([PROXY], [libproxy-1.0],
                       [LIBS+=" ${PROXY_LIBS}"
                        CXXFLAGS+=" ${PROXY_CFLAGS}"
-                       CPPFLAGS+=" ${PROXY_CFLAGS}"
                        have_proxy=1])
     ;;
 esac