diff --git a/src/mesa/main/querymatrix.c b/src/mesa/main/querymatrix.c
index 4ecd275ca83..e5c08a64146 100644
--- a/src/mesa/main/querymatrix.c
+++ b/src/mesa/main/querymatrix.c
@@ -70,7 +70,7 @@ fpclassify(double x)
     }
 }
 
-#elif defined(__APPLE__)
+#elif defined(__APPLE__) || defined(__CYGWIN__)
 
 /* fpclassify is available. */