diff --git a/src/libs/3rdparty/botan/botan.pro b/src/libs/3rdparty/botan/botan.pro
index 6abf907904f07c51810077027f2cfd4dd3dcdc05..3949ed87ac01ed2eb22cedc5fd6ced85aefe082c 100644
--- a/src/libs/3rdparty/botan/botan.pro
+++ b/src/libs/3rdparty/botan/botan.pro
@@ -20,6 +20,7 @@ unix:DEFINES += BOTAN_TARGET_OS_HAS_GETTIMEOFDAY BOTAN_HAS_ALLOC_MMAP \
     BOTAN_HAS_DYNAMICALLY_LOADED_ENGINE BOTAN_HAS_DYNAMIC_LOADER
 macx:DEFINES += BOTAN_TARGET_OS_IS_DARWIN
 *g++*:DEFINES += BOTAN_BUILD_COMPILER_IS_GCC
+*clang*:DEFINES += BOTAN_BUILD_COMPILER_IS_CLANG
 
 win32 {
     DEFINES += BOTAN_TARGET_OS_IS_WINDOWS \