diff --git a/src/CalcManager/preprocessor_cross_platform.h b/src/CalcManager/preprocessor_cross_platform.h
index 5ff91454..32b745d1 100644
--- a/src/CalcManager/preprocessor_cross_platform.h
+++ b/src/CalcManager/preprocessor_cross_platform.h
@@ -4,6 +4,8 @@
 
 // Empty macro definitions for Windows-specific preprocessor directives
 
+#ifndef __pragma
 #define __pragma(x)
+#endif
 
 #endif