diff --git a/CMakeLists.txt b/CMakeLists.txt
index ca01c01..d54b30c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -40,6 +40,7 @@ if (Iconv_FOUND)
     set(HAVE_ICONV 1)
 endif()
 
+include(CheckIncludeFile)
 include(CheckSymbolExists)
 include(TestStrerrorR)
 if (WIN32)
@@ -97,6 +98,7 @@ if (NOT WIN32)
     check_symbol_exists(clock_gettime "time.h" HAVE_CLOCK_GETTIME)
     check_symbol_exists(usleep "unistd.h" HAVE_USLEEP)
     check_symbol_exists(nanosleep "time.h" HAVE_NANOSLEEP)
+    CHECK_INCLUDE_FILE("netinet/in.h" HAVE_NETINET_IN_H)
 endif()
 configure_file("${CMAKE_CURRENT_SOURCE_DIR}/utils_config.h.in" "${CMAKE_CURRENT_BINARY_DIR}/utils_config.h")
 
diff --git a/http_client.cpp b/http_client.cpp
index 78ad978..6fb3b52 100644
--- a/http_client.cpp
+++ b/http_client.cpp
@@ -6,6 +6,10 @@
 #include <fcntl.h>
 #if _WIN32
 #include <Windows.h>
+#else
+#if HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
 #endif
 
 #include "cstr_util.h"
diff --git a/utils_config.h.in b/utils_config.h.in
index 25b207c..d5dc336 100644
--- a/utils_config.h.in
+++ b/utils_config.h.in
@@ -29,3 +29,4 @@
 #cmakedefine HAVE_CLOCK_GETTIME @HAVE_CLOCK_GETTIME@
 #cmakedefine HAVE_USLEEP @HAVE_USLEEP@
 #cmakedefine HAVE_NANOSLEEP @HAVE_NANOSLEEP@
+#cmakedefine HAVE_NETINET_IN_H @HAVE_NETINET_IN_H@