diff --git a/src/zm_define.h b/src/zm_define.h
index b542351f9..6fd060dce 100644
--- a/src/zm_define.h
+++ b/src/zm_define.h
@@ -41,4 +41,14 @@ typedef std::uint8_t uint8;
 
 #define SZFMTD "%" PRIuPTR
 
+#ifndef FALLTHROUGH
+#if defined(__clang__)
+#define FALLTHROUGH [[clang::fallthrough]]
+#elif defined(__GNUC__) && __GNUC__ >= 7
+#define FALLTHROUGH [[gnu::fallthrough]]
+#else
+#define FALLTHROUGH
+#endif
+#endif
+
 #endif // ZONEMINDER_SRC_ZM_DEFINE_H_
diff --git a/src/zm_remote_camera_http.cpp b/src/zm_remote_camera_http.cpp
index 5f5365fc1..fff12c394 100644
--- a/src/zm_remote_camera_http.cpp
+++ b/src/zm_remote_camera_http.cpp
@@ -621,7 +621,7 @@ int RemoteCameraHttp::GetResponse() {
             content_type[0] = '\0';
             content_boundary[0] = '\0';
             content_boundary_len = 0;
-            [[gnu::fallthrough]];
+            FALLTHROUGH;
           }
         case HEADERCONT :
           {
@@ -838,7 +838,7 @@ int RemoteCameraHttp::GetResponse() {
             subcontent_type_header[0] = '\0';
             content_length = 0;
             content_type[0] = '\0';
-            [[gnu::fallthrough]];
+            FALLTHROUGH;
           }
         case SUBHEADERCONT :
           {