diff --git a/src/kxcjk1013/kxcjk1013.cxx b/src/kxcjk1013/kxcjk1013.cxx
index 5d7f7574..b3c2b9b0 100644
--- a/src/kxcjk1013/kxcjk1013.cxx
+++ b/src/kxcjk1013/kxcjk1013.cxx
@@ -44,7 +44,7 @@ KXCJK1013::KXCJK1013(int device)
     }
     m_scale = 1;
     m_iio_device_num = device;
-    sprintf(trigger, "hrtimer-kxcjk1013-hr-dev%d", device);
+    snprintf(trigger, 64, "hrtimer-kxcjk1013-hr-dev%d", device);
 
     if (mraa_iio_create_trigger(m_iio, trigger) != MRAA_SUCCESS)
         fprintf(stderr, "Create trigger %s failed\n", trigger);
@@ -162,7 +162,7 @@ bool
 KXCJK1013::enable3AxisChannel()
 {
     char trigger[64];
-    sprintf(trigger, "kxcjk1013-hr-dev%d", m_iio_device_num);
+    snprintf(trigger, 64, "kxcjk1013-hr-dev%d", m_iio_device_num);
 
     mraa_iio_write_string(m_iio, "trigger/current_trigger", trigger);
     mraa_iio_write_int(m_iio, "scan_elements/in_accel_x_en", 1);
diff --git a/src/l3gd20/l3gd20.cxx b/src/l3gd20/l3gd20.cxx
index 537854f4..3a9b0792 100644
--- a/src/l3gd20/l3gd20.cxx
+++ b/src/l3gd20/l3gd20.cxx
@@ -60,7 +60,7 @@ L3GD20::L3GD20(int device) :
 
     m_scale = 1;
     m_iio_device_num = device;
-    sprintf(trigger, "hrtimer-l3gd20-hr-dev%d", device);
+    snprintf(trigger, 64, "hrtimer-l3gd20-hr-dev%d", device);
 
     if (mraa_iio_create_trigger(m_iio, trigger) != MRAA_SUCCESS)
         fprintf(stderr, "Create trigger %s failed\n", trigger);
@@ -449,7 +449,7 @@ bool
 L3GD20::enable3AxisChannel()
 {
     char trigger[64];
-    sprintf(trigger, "l3gd20-hr-dev%d", m_iio_device_num);
+    snprintf(trigger, 64, "l3gd20-hr-dev%d", m_iio_device_num);
 
     mraa_iio_write_string(m_iio, "trigger/current_trigger", trigger);
     mraa_iio_write_int(m_iio, "scan_elements/in_anglvel_x_en", 1);
diff --git a/src/mmc35240/mmc35240.cxx b/src/mmc35240/mmc35240.cxx
index 4e12dee1..9897c9df 100644
--- a/src/mmc35240/mmc35240.cxx
+++ b/src/mmc35240/mmc35240.cxx
@@ -62,7 +62,7 @@ MMC35240::MMC35240(int device)
     }
     m_scale = 1;
     m_iio_device_num = device;
-    sprintf(trigger, "hrtimer-mmc35240-hr-dev%d", device);
+    snprintf(trigger, 64, "hrtimer-mmc35240-hr-dev%d", device);
 
     if (mraa_iio_create_trigger(m_iio, trigger) != MRAA_SUCCESS)
         fprintf(stderr, "Create trigger %s failed\n", trigger);
@@ -192,7 +192,7 @@ bool
 MMC35240::enable3AxisChannel()
 {
     char trigger[64];
-    sprintf(trigger, "mmc35240-hr-dev%d", m_iio_device_num);
+    snprintf(trigger, 64, "mmc35240-hr-dev%d", m_iio_device_num);
 
     mraa_iio_write_string(m_iio, "trigger/current_trigger", trigger);
     mraa_iio_write_int(m_iio, "scan_elements/in_magn_x_en", 1);