diff --git a/include/villas/sample.h b/include/villas/sample.h
index 7c4c4fc36..302cedef5 100644
--- a/include/villas/sample.h
+++ b/include/villas/sample.h
@@ -102,7 +102,7 @@ struct sample {
 struct sample * sample_alloc(struct pool *p);
 
 /** Allocate a new sample from the heap. */
-struct sample * sample_alloc_mem(int capacity);
+struct sample * sample_alloc_heap(int capacity);
 
 /** Allocate a new sample from the same pool as \p smp and copy its content */
 struct sample * sample_clone(struct sample *smp);
diff --git a/lib/nodes/file.cpp b/lib/nodes/file.cpp
index 239719f7b..89d29bc93 100644
--- a/lib/nodes/file.cpp
+++ b/lib/nodes/file.cpp
@@ -321,7 +321,7 @@ int file_start(struct vnode *n)
 	rewind(f->stream_in);
 
 	/* Fast-forward */
-	struct sample *smp = sample_alloc_mem(vlist_length(&n->in.signals));
+	struct sample *smp = sample_alloc_heap(vlist_length(&n->in.signals));
 	for (unsigned i = 0; i < f->skip_lines; i++)
 		f->formatter->scan(f->stream_in, smp);
 
diff --git a/lib/sample.cpp b/lib/sample.cpp
index 4532da697..2e8c73f70 100644
--- a/lib/sample.cpp
+++ b/lib/sample.cpp
@@ -62,7 +62,7 @@ struct sample * sample_alloc(struct pool *p)
 	return s;
 }
 
-struct sample * sample_alloc_mem(int capacity)
+struct sample * sample_alloc_heap(int capacity)
 {
 	size_t sz = SAMPLE_LENGTH(capacity);
 
diff --git a/src/villas-convert.cpp b/src/villas-convert.cpp
index e11334794..751ca9be8 100644
--- a/src/villas-convert.cpp
+++ b/src/villas-convert.cpp
@@ -143,7 +143,7 @@ protected:
 			dirs[i].formatter->start(dtypes);
 		}
 
-		struct sample *smp = sample_alloc_mem(DEFAULT_SAMPLE_LENGTH);
+		struct sample *smp = sample_alloc_heap(DEFAULT_SAMPLE_LENGTH);
 
 		while (true) {
 			ret = dirs[0].formatter->scan(stdin, smp);