diff --git a/CMakeLists.txt b/CMakeLists.txt
index 12f7e1be..1f7642f4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -158,6 +158,7 @@ include(CheckTypeSize)
 
 CHECK_FUNCTION_EXISTS(bzero HAVE_BZERO)
 CHECK_FUNCTION_EXISTS(fork HAVE_FORK)
+CHECK_FUNCTION_EXISTS(getenv HAVE_GETENV)
 CHECK_FUNCTION_EXISTS(malloc HAVE_MALLOC)
 CHECK_FUNCTION_EXISTS(memset HAVE_MEMSET)
 CHECK_FUNCTION_EXISTS(realloc HAVE_REALLOC)
diff --git a/config.h.cmake b/config.h.cmake
index c894927a..0c2dbfba 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -53,6 +53,9 @@
 /* Define to 1 if you have the `fork' function. */
 #cmakedefine HAVE_FORK
 
+/* Define to 1 if you have the `getenv’ function. */
+#cmakedefine HAVE_GETENV
+
 /* Define to 1 if you have the <inttypes.h> header file. */
 #cmakedefine HAVE_INTTYPES_H
 
diff --git a/lib/libwebsockets.c b/lib/libwebsockets.c
index 28d798b2..0b5c309f 100644
--- a/lib/libwebsockets.c
+++ b/lib/libwebsockets.c
@@ -2097,6 +2097,7 @@ libwebsocket_create_context(struct lws_context_creation_info *info)
 				sizeof(context->http_proxy_address) - 1] = '\0';
 		context->http_proxy_port = info->http_proxy_port;
 	} else {
+#ifdef HAVE_GETENV
 		p = getenv("http_proxy");
 		if (p) {
 			strncpy(context->http_proxy_address, p,
@@ -2112,6 +2113,7 @@ libwebsocket_create_context(struct lws_context_creation_info *info)
 			*p = '\0';
 			context->http_proxy_port = atoi(p + 1);
 		}
+#endif
 	}
 
 	if (context->http_proxy_address[0]) {