diff --git a/src/libs/qmuparser/qmuparserdef.h b/src/libs/qmuparser/qmuparserdef.h
index 5ca3bef72..d5d5126f6 100644
--- a/src/libs/qmuparser/qmuparserdef.h
+++ b/src/libs/qmuparser/qmuparserdef.h
@@ -52,6 +52,10 @@
 #    define QMUP_NOEXCEPT_EXPR(x)
 #  endif
 
+#ifndef __has_cpp_attribute
+# define __has_cpp_attribute(x) 0
+#endif
+
 #if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
 #   define QMUP_FALLTHROUGH [[fallthrough]];
 #elif defined(Q_CC_CLANG) && __cplusplus >= 201103L
diff --git a/src/libs/vdxf/dxflib/dl_codes.h b/src/libs/vdxf/dxflib/dl_codes.h
index 48b98db73..cf7ad34d8 100644
--- a/src/libs/vdxf/dxflib/dl_codes.h
+++ b/src/libs/vdxf/dxflib/dl_codes.h
@@ -530,6 +530,10 @@ const double dxfColors[][3] =
 #define DL_DCS_TRANS_CODE      2
 #define DL_PCS_TRANS_CODE      3
 
+#ifndef __has_cpp_attribute
+# define __has_cpp_attribute(x) 0
+#endif
+
 #if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
 #   define DL_FALLTHROUGH [[fallthrough]];
 #elif defined(Q_CC_CLANG) && __cplusplus >= 201103L
diff --git a/src/libs/vmisc/def.h b/src/libs/vmisc/def.h
index eac7fadfe..3eb44d621 100644
--- a/src/libs/vmisc/def.h
+++ b/src/libs/vmisc/def.h
@@ -266,6 +266,10 @@ enum class GSizes : unsigned char { ALL,
 #define SCASSERT(cond) qt_noop();
 #endif /* V_NO_ASSERT */
 
+#ifndef __has_cpp_attribute
+# define __has_cpp_attribute(x) 0
+#endif
+
 #if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
 #   define V_FALLTHROUGH [[fallthrough]];
 #elif defined(Q_CC_CLANG) && __cplusplus >= 201103L