diff --git a/mex/build/octave/configure.ac b/mex/build/octave/configure.ac
index d31f4ba93cee0e83afb6f7d6d14f4f25bc17a5db..21365a6ac885001c582b001efb68f8e5d3d42dd1 100644
--- a/mex/build/octave/configure.ac
+++ b/mex/build/octave/configure.ac
@@ -36,7 +36,7 @@ AC_CANONICAL_HOST
 case ${host_os} in
   darwin*)
     CXXFLAGS="$($MKOCTFILE -p ALL_CXXFLAGS) -Wall -Wno-parentheses -Wold-style-cast -O2"
-    LDFLAGS+="$($MKOCTFILE -p OCTAVE_LIBS)"
+    LDFLAGS+=" $($MKOCTFILE -p OCTAVE_LIBS)"
     ;;
 esac