diff --git a/pkg/backends/backends.go b/pkg/backends/backends.go
index 31369cdd52..efdc4a41d9 100644
--- a/pkg/backends/backends.go
+++ b/pkg/backends/backends.go
@@ -77,6 +77,8 @@ func (b *Backends) Create(sp utils.ServicePort, hcLink string) (*composite.Backe
 		// LogConfig is using GA API so this is not considered for computing API version.
 		LogConfig: &composite.BackendServiceLogConfig{
 			Enable: true,
+			// Sampling rate needs to be specified explicitly.
+			SampleRate: 1.0,
 		},
 	}