diff --git a/compiler/alias.go b/compiler/alias.go
index bdc6cc4d..ee51c5e5 100644
--- a/compiler/alias.go
+++ b/compiler/alias.go
@@ -75,6 +75,9 @@ var stdlibAliases = map[string]string{
 // createAlias implements the function (in the builder) as a call to the alias
 // function.
 func (b *builder) createAlias(alias llvm.Value) {
+	b.llvmFn.SetVisibility(llvm.HiddenVisibility)
+	b.llvmFn.SetUnnamedAddr(true)
+
 	if b.Debug {
 		if b.fn.Syntax() != nil {
 			// Create debug info file if present.
diff --git a/compiler/compiler.go b/compiler/compiler.go
index cd2585f9..cdce396f 100644
--- a/compiler/compiler.go
+++ b/compiler/compiler.go
@@ -23,7 +23,7 @@ import (
 // Version of the compiler pacakge. Must be incremented each time the compiler
 // package changes in a way that affects the generated LLVM module.
 // This version is independent of the TinyGo version number.
-const Version = 19 // last change: fix channel ops with zero values
+const Version = 20 // last change: fix export math functions issue
 
 func init() {
 	llvm.InitializeAllTargets()