diff --git a/minimal-examples/secure-streams/minimal-secure-streams-alexa/CMakeLists.txt b/minimal-examples/secure-streams/minimal-secure-streams-alexa/CMakeLists.txt
index bad2498f6..6e5bdb3b3 100644
--- a/minimal-examples/secure-streams/minimal-secure-streams-alexa/CMakeLists.txt
+++ b/minimal-examples/secure-streams/minimal-secure-streams-alexa/CMakeLists.txt
@@ -26,7 +26,9 @@ if (requirements)
 		target_link_libraries(${SAMP} websockets asound pv_porcupine mpg123 ${LIBWEBSOCKETS_DEP_LIBS})
 	endif()
 
-	if (LWS_WITH_SECURE_STREAMS_PROXY_API)	
+	CHECK_C_SOURCE_COMPILES("#include <libwebsockets.h>\nint main(void) {\ni#if defined(LWS_WITH_SECURE_STREAMS_PROXY_API)\n return 0;\n #else\n fail\n #endif\n return 0;\n}\n" HAS_LWS_WITH_SECURE_STREAMS_PROXY_API)
+
+	if (HAS_LWS_WITH_SECURE_STREAMS_PROXY_API)
 		add_compile_options(-DLWS_SS_USE_SSPC)
 
 		add_executable(${SAMP}-client ${SRCS})
diff --git a/minimal-examples/secure-streams/minimal-secure-streams-avs/CMakeLists.txt b/minimal-examples/secure-streams/minimal-secure-streams-avs/CMakeLists.txt
index 1d4d4ba4f..859df44a6 100644
--- a/minimal-examples/secure-streams/minimal-secure-streams-avs/CMakeLists.txt
+++ b/minimal-examples/secure-streams/minimal-secure-streams-avs/CMakeLists.txt
@@ -24,7 +24,9 @@ if (requirements)
 		target_link_libraries(${SAMP} websockets ${LIBWEBSOCKETS_DEP_LIBS})
 	endif()
 
-	if (LWS_WITH_SECURE_STREAMS_PROXY_API)
+	CHECK_C_SOURCE_COMPILES("#include <libwebsockets.h>\nint main(void) {\ni#if defined(LWS_WITH_SECURE_STREAMS_PROXY_API)\n return 0;\n #else\n fail\n #endif\n return 0;\n}\n" HAS_LWS_WITH_SECURE_STREAMS_PROXY_API)
+
+	if (HAS_LWS_WITH_SECURE_STREAMS_PROXY_API)
 		add_compile_options(-DLWS_SS_USE_SSPC)
 
 		add_executable(${SAMP}-client main-client.c avs.c)
diff --git a/minimal-examples/secure-streams/minimal-secure-streams-metadata/CMakeLists.txt b/minimal-examples/secure-streams/minimal-secure-streams-metadata/CMakeLists.txt
index 63cfea8a8..f315c7a0c 100644
--- a/minimal-examples/secure-streams/minimal-secure-streams-metadata/CMakeLists.txt
+++ b/minimal-examples/secure-streams/minimal-secure-streams-metadata/CMakeLists.txt
@@ -24,7 +24,9 @@ if (requirements)
 		target_link_libraries(${SAMP} websockets ${LIBWEBSOCKETS_DEP_LIBS})
 	endif()
 
-	if (LWS_WITH_SECURE_STREAMS_PROXY_API)
+	CHECK_C_SOURCE_COMPILES("#include <libwebsockets.h>\nint main(void) {\ni#if defined(LWS_WITH_SECURE_STREAMS_PROXY_API)\n return 0;\n #else\n fail\n #endif\n return 0;\n}\n" HAS_LWS_WITH_SECURE_STREAMS_PROXY_API)
+
+	if (HAS_LWS_WITH_SECURE_STREAMS_PROXY_API)
 		add_compile_options(-DLWS_SS_USE_SSPC)
 
 		add_executable(${SAMP}-client minimal-secure-streams.c)
diff --git a/minimal-examples/secure-streams/minimal-secure-streams-post/CMakeLists.txt b/minimal-examples/secure-streams/minimal-secure-streams-post/CMakeLists.txt
index c0bd62c7d..c3d3d7b4a 100644
--- a/minimal-examples/secure-streams/minimal-secure-streams-post/CMakeLists.txt
+++ b/minimal-examples/secure-streams/minimal-secure-streams-post/CMakeLists.txt
@@ -32,7 +32,9 @@ if (requirements)
 		target_link_libraries(${SAMP} websockets ${LIBWEBSOCKETS_DEP_LIBS})
 	endif()
 
-	if (LWS_WITH_SECURE_STREAMS_PROXY_API)
+	CHECK_C_SOURCE_COMPILES("#include <libwebsockets.h>\nint main(void) {\ni#if defined(LWS_WITH_SECURE_STREAMS_PROXY_API)\n return 0;\n #else\n fail\n #endif\n return 0;\n}\n" HAS_LWS_WITH_SECURE_STREAMS_PROXY_API)
+
+	if (HAS_LWS_WITH_SECURE_STREAMS_PROXY_API)
 		add_compile_options(-DLWS_SS_USE_SSPC)
 
 		add_executable(${SAMP}-client minimal-secure-streams-post.c)
diff --git a/minimal-examples/secure-streams/minimal-secure-streams-smd/CMakeLists.txt b/minimal-examples/secure-streams/minimal-secure-streams-smd/CMakeLists.txt
index 7c9a4295c..223e3e8c0 100644
--- a/minimal-examples/secure-streams/minimal-secure-streams-smd/CMakeLists.txt
+++ b/minimal-examples/secure-streams/minimal-secure-streams-smd/CMakeLists.txt
@@ -31,7 +31,9 @@ if (requirements)
 		target_link_libraries(${PROJECT_NAME} websockets ${LIBWEBSOCKETS_DEP_LIBS})
 	endif()
 
-	if (LWS_WITH_SECURE_STREAMS_PROXY_API)
+	CHECK_C_SOURCE_COMPILES("#include <libwebsockets.h>\nint main(void) {\ni#if defined(LWS_WITH_SECURE_STREAMS_PROXY_API)\n return 0;\n #else\n fail\n #endif\n return 0;\n}\n" HAS_LWS_WITH_SECURE_STREAMS_PROXY_API)
+
+	if (HAS_LWS_WITH_SECURE_STREAMS_PROXY_API)
 		add_compile_options(-DLWS_SS_USE_SSPC)
 
 		add_executable(${PROJECT_NAME}-client minimal-secure-streams-smd.c)
diff --git a/minimal-examples/secure-streams/minimal-secure-streams/CMakeLists.txt b/minimal-examples/secure-streams/minimal-secure-streams/CMakeLists.txt
index 1f97b9cd2..5a3d6ebef 100644
--- a/minimal-examples/secure-streams/minimal-secure-streams/CMakeLists.txt
+++ b/minimal-examples/secure-streams/minimal-secure-streams/CMakeLists.txt
@@ -32,7 +32,9 @@ if (requirements)
 		target_link_libraries(${SAMP} websockets ${LIBWEBSOCKETS_DEP_LIBS})
 	endif()
 
-	if (LWS_WITH_SECURE_STREAMS_PROXY_API)
+	CHECK_C_SOURCE_COMPILES("#include <libwebsockets.h>\nint main(void) {\ni#if defined(LWS_WITH_SECURE_STREAMS_PROXY_API)\n return 0;\n #else\n fail\n #endif\n return 0;\n}\n" HAS_LWS_WITH_SECURE_STREAMS_PROXY_API)
+
+	if (HAS_LWS_WITH_SECURE_STREAMS_PROXY_API)
 		add_compile_options(-DLWS_SS_USE_SSPC)
 
 		add_executable(${SAMP}-client minimal-secure-streams.c)