diff --git a/simio/simio.c b/simio/simio.c
index 2e3fb72..4e338c3 100644
--- a/simio/simio.c
+++ b/simio/simio.c
@@ -19,6 +19,7 @@
 #include <string.h>
 
 #include "output.h"
+#include "output_util.h"
 #include "dis.h"
 #include "simio.h"
 #include "simio_cpu.h"
diff --git a/ui/main.c b/ui/main.c
index eb9bddc..83da0a9 100644
--- a/ui/main.c
+++ b/ui/main.c
@@ -37,6 +37,7 @@
 #include "opdb.h"
 #include "reader.h"
 #include "output.h"
+#include "output_util.h"
 #include "simio.h"
 #include "ctrlc.h"
 
diff --git a/ui/stdcmd.c b/ui/stdcmd.c
index 50cea1e..abb5197 100644
--- a/ui/stdcmd.c
+++ b/ui/stdcmd.c
@@ -25,6 +25,7 @@
 #include "vector.h"
 #include "stdcmd.h"
 #include "output.h"
+#include "output_util.h"
 #include "reader.h"
 #include "expr.h"
 
diff --git a/util/output.c b/util/output.c
index d11d7b5..9442a34 100644
--- a/util/output.c
+++ b/util/output.c
@@ -179,53 +179,3 @@ void capture_end(void)
 {
 	capture_func = NULL;
 }
-
-/************************************************************************
- * Name lists
- */
-
-static int namelist_cmp(const void *a, const void *b)
-{
-	return strcasecmp(*(const char **)a, *(const char **)b);
-}
-
-void namelist_print(struct vector *v)
-{
-	int i;
-	int max_len = 0;
-	int rows, cols;
-
-	qsort(v->ptr, v->size, v->elemsize, namelist_cmp);
-
-	for (i = 0; i < v->size; i++) {
-		const char *text = VECTOR_AT(*v, i, const char *);
-		int len = strlen(text);
-
-		if (len > max_len)
-			max_len = len;
-	}
-
-	max_len += 2;
-	cols = 72 / max_len;
-	rows = (v->size + cols - 1) / cols;
-
-	for (i = 0; i < rows; i++) {
-		int j;
-
-		printc("    ");
-		for (j = 0; j < cols; j++) {
-			int k = j * rows + i;
-			const char *text;
-
-			if (k >= v->size)
-				break;
-
-			text = VECTOR_AT(*v, k, const char *);
-			printc("%s", text);
-			for (k = strlen(text); k < max_len; k++)
-				printc(" ");
-		}
-
-		printc("\n");
-	}
-}
diff --git a/util/output.h b/util/output.h
index 1fd548e..7d1c7b9 100644
--- a/util/output.h
+++ b/util/output.h
@@ -48,9 +48,4 @@ typedef void (*capture_func_t)(void *user_data, const char *text);
 void capture_start(capture_func_t, void *user_data);
 void capture_end(void);
 
-/* Name lists. This function is used for printing multi-column sorted
- * lists of constant strings. Expected is a vector of const char *.
- */
-void namelist_print(struct vector *v);
-
 #endif
diff --git a/util/output_util.c b/util/output_util.c
index b9f438c..324741d 100644
--- a/util/output_util.c
+++ b/util/output_util.c
@@ -18,6 +18,8 @@
 
 #include <stdio.h>
 #include <assert.h>
+#include <string.h>
+#include <stdlib.h>
 
 #include "dis.h"
 #include "output_util.h"
@@ -304,3 +306,53 @@ int print_address(address_t addr, char *out, int max_len)
 	snprintf(out, max_len, "0x%04x", addr);
 	return 0;
 }
+
+/************************************************************************
+ * Name lists
+ */
+
+static int namelist_cmp(const void *a, const void *b)
+{
+	return strcasecmp(*(const char **)a, *(const char **)b);
+}
+
+void namelist_print(struct vector *v)
+{
+	int i;
+	int max_len = 0;
+	int rows, cols;
+
+	qsort(v->ptr, v->size, v->elemsize, namelist_cmp);
+
+	for (i = 0; i < v->size; i++) {
+		const char *text = VECTOR_AT(*v, i, const char *);
+		int len = strlen(text);
+
+		if (len > max_len)
+			max_len = len;
+	}
+
+	max_len += 2;
+	cols = 72 / max_len;
+	rows = (v->size + cols - 1) / cols;
+
+	for (i = 0; i < rows; i++) {
+		int j;
+
+		printc("    ");
+		for (j = 0; j < cols; j++) {
+			int k = j * rows + i;
+			const char *text;
+
+			if (k >= v->size)
+				break;
+
+			text = VECTOR_AT(*v, k, const char *);
+			printc("%s", text);
+			for (k = strlen(text); k < max_len; k++)
+				printc(" ");
+		}
+
+		printc("\n");
+	}
+}
diff --git a/util/output_util.h b/util/output_util.h
index 339328c..ac6add9 100644
--- a/util/output_util.h
+++ b/util/output_util.h
@@ -39,4 +39,9 @@ void show_regs(const address_t *regs);
  */
 int print_address(address_t addr, char *buf, int max_len);
 
+/* Name lists. This function is used for printing multi-column sorted
+ * lists of constant strings. Expected is a vector of const char *.
+ */
+void namelist_print(struct vector *v);
+
 #endif