diff --git a/src/gas/mq2.h b/src/gas/mq2.h
index d0625a9d..137ac4ca 100644
--- a/src/gas/mq2.h
+++ b/src/gas/mq2.h
@@ -37,7 +37,7 @@ namespace upm {
      * sensor with a detect concentration of 300-10000ppm.
      *
      * @ingroup gas
-     * @snippet mq2-example.cxx Interesting
+     * @snippet mq2.cxx Interesting
      * @image html grovegas.jpeg
      */
     class MQ2 : public Gas {
diff --git a/src/gas/mq3.h b/src/gas/mq3.h
index 3eeb688c..c5e2cae9 100644
--- a/src/gas/mq3.h
+++ b/src/gas/mq3.h
@@ -37,7 +37,7 @@ namespace upm {
      * detect rate is of 0.04-4mg/L Alcohol.
      *
      * @ingroup gas
-     * @snippet mq3-example.cxx Interesting
+     * @snippet mq3.cxx Interesting
      * @image html grovegas.jpeg
      */
     class MQ3 : public Gas {
diff --git a/src/gas/mq5.h b/src/gas/mq5.h
index f9dcf352..26c72f59 100644
--- a/src/gas/mq5.h
+++ b/src/gas/mq5.h
@@ -37,7 +37,7 @@ namespace upm {
      * 300-10000ppm.
      *
      * @ingroup gas
-     * @snippet mq5-example.cxx Interesting
+     * @snippet mq5.cxx Interesting
      * @image html grovegas.jpeg
      */
     class MQ5 : public Gas {
diff --git a/src/gas/mq9.h b/src/gas/mq9.h
index b507dda6..0e4eada4 100644
--- a/src/gas/mq9.h
+++ b/src/gas/mq9.h
@@ -36,7 +36,7 @@ namespace upm {
      * Liquefied Gas. It's sensitivty is 10-1000ppmCO 100-10000PPm Gas.
      *
      * @ingroup gas
-     * @snippet mq9-example.cxx Interesting
+     * @snippet mq9.cxx Interesting
      * @image html mq9.jpeg
      */
     class MQ9 : public Gas {