diff --git a/configure.ac b/configure.ac
index 1f8c61f355..e887ddd3bf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -198,7 +198,7 @@ AS_CASE([$CC],
     gcc_prefix=gcc- gcc_suffix=`echo "$CC" | sed 's/^gcc//'`
     AC_PROG_CXX(g++${gcc_suffix})],
 [clang-*], [
-    gcc_prefix=clang- gcc_suffix=`echo "$CC" | sed 's/^gcc//'`
+    gcc_prefix=clang- gcc_suffix=`echo "$CC" | sed 's/^clang//'`
     AC_PROG_CXX(clang++${gcc_suffix})],
 [gcc_prefix= gcc_suffix=])