diff --git a/point.cpp b/point.cpp
index 0b2250d6..beb6f416 100644
--- a/point.cpp
+++ b/point.cpp
@@ -25,7 +25,9 @@
 
 using namespace std;
 
-#pragma GCC optimize("-O3")
+#if defined(COMPILER_GCC)
+    #pragma GCC optimize("-O3")
+#endif
 
 //-----------------------------------------------------------------------------
 template <size_t S>
diff --git a/vector.cpp b/vector.cpp
index e7915c25..a221bdfb 100644
--- a/vector.cpp
+++ b/vector.cpp
@@ -28,7 +28,9 @@
 #include <limits>
 #include <numeric>
 
+#if defined(COMPILER_GCC)
 #pragma GCC optimize("-O3")
+#endif
 
 //-----------------------------------------------------------------------------
 using namespace util;