diff --git a/compiler/compiler.go b/compiler/compiler.go
index 7a1c1e44..43241246 100644
--- a/compiler/compiler.go
+++ b/compiler/compiler.go
@@ -3261,7 +3261,11 @@ func (b *builder) createUnOp(unop *ssa.UnOp) (llvm.Value, error) {
 			// Instead of a load from the global, create a bitcast of the
 			// function pointer itself.
 			name := strings.TrimSuffix(unop.X.(*ssa.Global).Name(), "$funcaddr")
-			_, fn := b.getFunction(b.fn.Pkg.Members[name].(*ssa.Function))
+			pkg := b.fn.Pkg
+			if pkg == nil {
+				pkg = b.fn.Origin().Pkg
+			}
+			_, fn := b.getFunction(pkg.Members[name].(*ssa.Function))
 			if fn.IsNil() {
 				return llvm.Value{}, b.makeError(unop.Pos(), "cgo function not found: "+name)
 			}
diff --git a/testdata/cgo/main.go b/testdata/cgo/main.go
index 1b810a56..aac5221f 100644
--- a/testdata/cgo/main.go
+++ b/testdata/cgo/main.go
@@ -43,6 +43,7 @@ func main() {
 	println("callback 1:", C.doCallback(20, 30, cb))
 	cb = C.binop_t(C.mul)
 	println("callback 2:", C.doCallback(20, 30, cb))
+	genericCallbackCall[int]()
 
 	// variadic functions
 	println("variadic0:", C.variadic0())
@@ -197,3 +198,11 @@ func printBitfield(bitfield *C.bitfield_t) {
 	println("bitfield d:", bitfield.d)
 	println("bitfield e:", bitfield.e)
 }
+
+type Int interface {
+	int | uint
+}
+
+func genericCallbackCall[T Int]() {
+	println("callback inside generic function:", C.doCallback(20, 30, C.binop_t(C.add)))
+}
diff --git a/testdata/cgo/out.txt b/testdata/cgo/out.txt
index d5f3b137..781187b5 100644
--- a/testdata/cgo/out.txt
+++ b/testdata/cgo/out.txt
@@ -13,6 +13,7 @@ defined expr: 9
 25: 25
 callback 1: 50
 callback 2: 600
+callback inside generic function: 50
 variadic0: 1
 variadic2: 15
 headerfunc: 6