diff --git a/lib/hist.c b/lib/hist.c
index 349486ab4..46885ec69 100644
--- a/lib/hist.c
+++ b/lib/hist.c
@@ -182,7 +182,7 @@ void hist_plot(struct hist *h)
 		for (int i = 0; i < bar; i++)
 			buf = strcatf(&buf, "\u2588");
 
-		stats(buf);
+		stats("%s", buf);
 		free(buf);
 	}
 
diff --git a/lib/hooks/jitter_calc.c b/lib/hooks/jitter_calc.c
index f87fcab3a..23ef825ed 100644
--- a/lib/hooks/jitter_calc.c
+++ b/lib/hooks/jitter_calc.c
@@ -24,6 +24,8 @@
  * @{
  */
 
+#include <inttypes.h>
+
 #include "hook.h"
 #include "plugin.h"
 #include "timing.h"
@@ -73,7 +75,7 @@ int hook_jitter_ts(struct hook *h, struct sample *smps[], size_t *cnt)
 		*/
 		jitter_val[(curr_count+1)%GPS_NTP_DELAY_WIN_SIZE] = jitter_val[curr_count] + (abs(curr_delay_us) - jitter_val[curr_count])/16;
 
-		info("jitter %ld usec, moving average %ld usec, moving variance %ld usec\n", jitter_val[(curr_count+1)%GPS_NTP_DELAY_WIN_SIZE], moving_avg[curr_count], moving_var[curr_count]);
+		stats("%s: jitter=%" PRId64 " usec, moving average=%" PRId64 " usec, moving variance=%" PRId64 " usec", __FUNCTION__, jitter_val[(curr_count+1)%GPS_NTP_DELAY_WIN_SIZE], moving_avg[curr_count], moving_var[curr_count]);
 
 		curr_count++;
 		if(curr_count >= GPS_NTP_DELAY_WIN_SIZE)
diff --git a/lib/nodes/file.c b/lib/nodes/file.c
index ed223a634..0d4d53e4b 100644
--- a/lib/nodes/file.c
+++ b/lib/nodes/file.c
@@ -22,6 +22,7 @@
 
 #include <unistd.h>
 #include <string.h>
+#include <inttypes.h>
 
 #include "nodes/file.h"
 #include "utils.h"
@@ -335,7 +336,7 @@ retry:	values = sample_io_villas_fscan(f->read.handle->file, s, &flags); /* Get
 		if (ex == 0)
 			serror("Failed to wait for timer");
 		else if (ex != 1)
-			warn("Overrun: %lu", ex - 1);
+			warn("Overrun: %" PRIu64, ex - 1);
 	}
 
 	return 1;
diff --git a/lib/nodes/websocket.c b/lib/nodes/websocket.c
index 4002aceb5..2b65c6e77 100644
--- a/lib/nodes/websocket.c
+++ b/lib/nodes/websocket.c
@@ -159,7 +159,7 @@ static void websocket_connection_close(struct websocket_connection *c, struct lw
 
 	msg = strcatf(&msg, ": status=%u, reason=%s", status, reason);
 
-	warn(msg);
+	warn("%s", msg);
 
 	free(msg);
 }
diff --git a/src/hook.c b/src/hook.c
index a12d36623..78f35121c 100644
--- a/src/hook.c
+++ b/src/hook.c
@@ -53,7 +53,7 @@ static int hook_parse_cli(struct hook *h, char *params[], int paramlen)
 	/* Concat all params */
 	str = NULL;
 	for (int i = 0; i < paramlen; i++)
-		str = strcatf(&str, params[i]);
+		str = strcatf(&str, "%s", params[i]);
 
 	config_set_auto_convert(&cfg, 1);