diff --git a/src/sysprof/sysprof-logs-section.c b/src/sysprof/sysprof-logs-section.c
index 3428c6f3..288f3387 100644
--- a/src/sysprof/sysprof-logs-section.c
+++ b/src/sysprof/sysprof-logs-section.c
@@ -80,6 +80,8 @@ static char *
 format_number (gpointer unused,
                guint    number)
 {
+  if (number == 0)
+    return NULL;
   return g_strdup_printf ("%'u", number);
 }
 
diff --git a/src/sysprof/sysprof-marks-section.c b/src/sysprof/sysprof-marks-section.c
index 8aeb89e3..762ca5ee 100644
--- a/src/sysprof/sysprof-marks-section.c
+++ b/src/sysprof/sysprof-marks-section.c
@@ -38,6 +38,8 @@ static char *
 format_number (gpointer unused,
                guint    number)
 {
+  if (number == 0)
+    return NULL;
   return g_strdup_printf ("%'u", number);
 }
 
diff --git a/src/sysprof/sysprof-processes-section.c b/src/sysprof/sysprof-processes-section.c
index ebc6cccb..577916c6 100644
--- a/src/sysprof/sysprof-processes-section.c
+++ b/src/sysprof/sysprof-processes-section.c
@@ -42,6 +42,8 @@ static char *
 format_number (gpointer unused,
                guint    number)
 {
+  if (number == 0)
+    return NULL;
   return g_strdup_printf ("%'u", number);
 }
 
diff --git a/src/sysprof/sysprof-samples-section.c b/src/sysprof/sysprof-samples-section.c
index a20c68a5..e02ea474 100644
--- a/src/sysprof/sysprof-samples-section.c
+++ b/src/sysprof/sysprof-samples-section.c
@@ -40,6 +40,8 @@ static char *
 format_number (gpointer unused,
                guint    number)
 {
+  if (number == 0)
+    return NULL;
   return g_strdup_printf ("%'u", number);
 }