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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 8c6a7f85..fc9ace6c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -183,7 +183,7 @@ fi
# Check for the sbts2050_header.h that was added after the 3.6 release
oldCPPFLAGS=$CPPFLAGS
-CPPFLAGS="$CPPFLAGS"
+CPPFLAGS="$CPPFLAGS -I$SYSMOBTS_INCDIR"
AC_CHECK_HEADER([sysmocom/femtobts/sbts2050_header.h],
[sysmo_uc_header="yes"],[])
CPPFLAGS=$oldCPPFLAGS