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-rw-r--r--configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 4c6fbb3..9a72d64 100644
--- a/configure.ac
+++ b/configure.ac
@@ -24,7 +24,7 @@ AC_CONFIG_SRCDIR([include/api.h])
AM_INIT_AUTOMAKE
dnl Checks for programs.
-AC_PROG_CC
+AC_PROG_CC_C99
GUILE_FLAGS