diff --git a/m4/cares-compilers.m4 b/m4/cares-compilers.m4
index 738a8de..9df5da4 100644
--- a/m4/cares-compilers.m4
+++ b/m4/cares-compilers.m4
@@ -16,7 +16,7 @@
 #***************************************************************************
 
 # File version for 'aclocal' use. Keep it a single number.
-# serial 23
+# serial 24
 
 
 dnl CARES_CHECK_COMPILER
@@ -42,7 +42,7 @@ AC_DEFUN([CARES_CHECK_COMPILER], [
   CARES_CHECK_COMPILER_GNU
   CARES_CHECK_COMPILER_LCC
   CARES_CHECK_COMPILER_SGI_MIPSpro_C
-  CARES_CHECK_COMPILER_SGI_MIPS _C
+  CARES_CHECK_COMPILER_SGI_MIPS_C
   CARES_CHECK_COMPILER_SUN
   CARES_CHECK_COMPILER_TINYC
   #