diff --git a/src/gallium/drivers/swr/rasterizer/memory/Convert.h b/src/gallium/drivers/swr/rasterizer/memory/Convert.h
index 4c4642f6c64..42b973c13fc 100644
--- a/src/gallium/drivers/swr/rasterizer/memory/Convert.h
+++ b/src/gallium/drivers/swr/rasterizer/memory/Convert.h
@@ -32,6 +32,8 @@
 #pragma warning(disable: 4723)
 #endif
 
+#include <cmath>
+
 //////////////////////////////////////////////////////////////////////////
 /// @brief Convert an IEEE 754 16-bit float to an 32-bit single precision
 ///        float