diff --git a/configure.ac b/configure.ac
index be5c3d5..d610f28 100644
--- a/configure.ac
+++ b/configure.ac
@@ -29,7 +29,7 @@ PKG_CHECK_MODULES(SPEK, [$pkg_modules])
 AC_SUBST(SPEK_CFLAGS)
 AC_SUBST(SPEK_LIBS)
 
-SPEK_PACKAGES="--pkg gtk+-2.0 --pkg gio-2.0 --pkg posix"
+SPEK_PACKAGES="--pkg gtk+-2.0 --pkg gio-2.0"
 AC_SUBST(SPEK_PACKAGES)
 
 AC_CHECK_LIB(m, log10f)
diff --git a/src/spek-pipeline.vala b/src/spek-pipeline.vala
index 5b6aedc..b3f45cb 100644
--- a/src/spek-pipeline.vala
+++ b/src/spek-pipeline.vala
@@ -122,7 +122,7 @@ namespace Spek {
 			float cf = 2f * (float) Math.PI / nfft;
 			int size;
 
-			Posix.memset (output, 0, sizeof (float) * bands);
+			Memory.set (output, 0, sizeof (float) * bands);
 
 			while ((size = cx.read (this.buffer)) > 0) {
 				lock (quit) {
@@ -177,7 +177,7 @@ namespace Spek {
 						if (sample == samples) {
 							return null;
 						}
-						Posix.memset (output, 0, sizeof (float) * bands);
+						Memory.set (output, 0, sizeof (float) * bands);
 						frames = 0;
 						num_fft = 0;
 					}