diff --git a/Modules/FortranCInterface/CMakeLists.txt b/Modules/FortranCInterface/CMakeLists.txt
index 4bc7a109d..778c4f445 100644
--- a/Modules/FortranCInterface/CMakeLists.txt
+++ b/Modules/FortranCInterface/CMakeLists.txt
@@ -21,12 +21,16 @@ list(REMOVE_DUPLICATES global_symbols)
 
 # List manglings of module symbol names to try.
 set(module_symbols
-  __my_module_MOD_my_sub  # GNU
+  __my_module_MOD_my_sub  # GNU 4.3
+  __my_module__my_sub     # GNU 4.2
+  __mymodule__mysub       # GNU 4.2
   __my_module_NMOD_my_sub # VisualAge
   __mymodule_MOD_mysub    # GNU
   __mymodule_NMOD_mysub   # VisualAge
+  my_module_my_sub_       # PGI 8
   my_module$my_sub        # HP
   my_module_mp_my_sub_    # Intel
+  mymodule_mysub_         # PGI 8
   mymodule$mysub          # HP
   mymodule_mp_mysub_      # Intel
   ${FortranCInterface_MODULE_SYMBOLS}
@@ -66,7 +70,7 @@ endforeach()
 add_library(myfort STATIC mysub.f my_sub.f ${myfort_modules})
 
 # Provide symbols through C but fall back to Fortran.
-add_library(symbols STATIC ${symbol_sources})
+add_library(symbols STATIC ${symbol_sources} mymodule_.c my_module_.c)
 target_link_libraries(symbols myfort)
 
 # Require symbols through Fortran.
diff --git a/Modules/FortranCInterface/my_module_.c b/Modules/FortranCInterface/my_module_.c
new file mode 100644
index 000000000..bba63cb34
--- /dev/null
+++ b/Modules/FortranCInterface/my_module_.c
@@ -0,0 +1 @@
+void my_module_(void){}
diff --git a/Modules/FortranCInterface/mymodule_.c b/Modules/FortranCInterface/mymodule_.c
new file mode 100644
index 000000000..68550b296
--- /dev/null
+++ b/Modules/FortranCInterface/mymodule_.c
@@ -0,0 +1 @@
+void mymodule_(void){}