diff --git a/tinyexpr.c b/tinyexpr.c
index 90ed8fc..570f2fd 100755
--- a/tinyexpr.c
+++ b/tinyexpr.c
@@ -49,6 +49,11 @@ For log = natural log uncomment the next line. */
 #define INFINITY (1.0/0.0)
 #endif
 
+/* https://github.com/codeplea/tinyexpr/issues/34 */
+#ifdef _MSC_VER
+#pragma function(ceil)
+#pragma function(floor)
+#endif
 
 typedef double (*te_fun2)(double, double);