diff --git a/core/oslib/audiobackend_alsa.cpp b/core/oslib/audiobackend_alsa.cpp
index e25c560ce..0f2a5599c 100644
--- a/core/oslib/audiobackend_alsa.cpp
+++ b/core/oslib/audiobackend_alsa.cpp
@@ -122,7 +122,7 @@ static u32 alsa_push(void* frame, u32 samples, bool wait)
 		fprintf(stderr, "ALSA: underrun occurred\n");
 		snd_pcm_prepare(handle);
 		// Write some silence then our samples
-		const size_t silence_size = period_size;
+		const size_t silence_size = period_size * 4;
 		void *silence = alloca(silence_size * 4);
 		memset(silence, 0, silence_size * 4);
 		rc = snd_pcm_writei(handle, silence, silence_size);