diff --git a/sammy/src/clm/mclm0.f b/sammy/src/clm/mclm0.f90
similarity index 100%
rename from sammy/src/clm/mclm0.f
rename to sammy/src/clm/mclm0.f90
diff --git a/sammy/src/clm/mclm1.f b/sammy/src/clm/mclm1.f90
similarity index 100%
rename from sammy/src/clm/mclm1.f
rename to sammy/src/clm/mclm1.f90
diff --git a/sammy/src/clm/mclm2.f b/sammy/src/clm/mclm2.f90
similarity index 100%
rename from sammy/src/clm/mclm2.f
rename to sammy/src/clm/mclm2.f90
diff --git a/sammy/src/clm/mclm3.f b/sammy/src/clm/mclm3.f90
similarity index 100%
rename from sammy/src/clm/mclm3.f
rename to sammy/src/clm/mclm3.f90
diff --git a/sammy/src/clm/mclm4.f b/sammy/src/clm/mclm4.f90
similarity index 100%
rename from sammy/src/clm/mclm4.f
rename to sammy/src/clm/mclm4.f90
diff --git a/sammy/src/clm/mclm5.f b/sammy/src/clm/mclm5.f90
similarity index 100%
rename from sammy/src/clm/mclm5.f
rename to sammy/src/clm/mclm5.f90
diff --git a/sammy/src/clm/mclm6.f b/sammy/src/clm/mclm6.f90
similarity index 100%
rename from sammy/src/clm/mclm6.f
rename to sammy/src/clm/mclm6.f90
diff --git a/sammy/src/clm/mclm7.f b/sammy/src/clm/mclm7.f90
similarity index 100%
rename from sammy/src/clm/mclm7.f
rename to sammy/src/clm/mclm7.f90
diff --git a/sammy/src/clm/mclm8.f b/sammy/src/clm/mclm8.f90
similarity index 100%
rename from sammy/src/clm/mclm8.f
rename to sammy/src/clm/mclm8.f90
diff --git a/sammy/src/sammy/CMakeLists.txt b/sammy/src/sammy/CMakeLists.txt
index 109b3532b6d213685806655aa6a93298aff047fb..757495bcb7a98c416bfb5b942661cb707b31bf8c 100644
--- a/sammy/src/sammy/CMakeLists.txt
+++ b/sammy/src/sammy/CMakeLists.txt
@@ -50,15 +50,15 @@ APPEND_SET(SAMMY_SOURCES
             ../clm/dopush3.f
             ../clm/dopush4.f
 
-            ../clm/mclm0.f
-            ../clm/mclm1.f
-            ../clm/mclm2.f
-            ../clm/mclm3.f
-            ../clm/mclm4.f
-            ../clm/mclm5.f
-            ../clm/mclm6.f
-            ../clm/mclm7.f
-            ../clm/mclm8.f
+            ../clm/mclm0.f90
+            ../clm/mclm1.f90
+            ../clm/mclm2.f90
+            ../clm/mclm3.f90
+            ../clm/mclm4.f90
+            ../clm/mclm5.f90
+            ../clm/mclm6.f90
+            ../clm/mclm7.f90
+            ../clm/mclm8.f90
             ../clm/mclm8a.f90
             ../clm/CrystalLatticeBroadening_M.f90