diff --git a/configure b/configure
index 41753caf..2fd463a5 100755
--- a/configure
+++ b/configure
@@ -7721,7 +7721,7 @@ fi
 
 if test x"$pac_cv_openmp" == x"yes" ; then
    FDEFINES="$psblas_cv_define_prepend-DOPENMP $FDEFINES";
-   CDEFINES="-DOPENMP $CDEFINES";
+   CDEFINES="$CDEFINES";
    CHAVEOPENMP="#define OPENMP"
    FCOPT="$FCOPT $pac_cv_openmp_fcopt";
    CCOPT="$CCOPT $pac_cv_openmp_ccopt";
diff --git a/configure.ac b/configure.ac
index d760053e..1b98681d 100755
--- a/configure.ac
+++ b/configure.ac
@@ -579,7 +579,7 @@ FLINK="$MPIFC"
 PAC_ARG_OPENMP()
 if test x"$pac_cv_openmp" == x"yes" ; then
    FDEFINES="$psblas_cv_define_prepend-DOPENMP $FDEFINES";
-   CDEFINES="-DOPENMP $CDEFINES";
+   CDEFINES="$CDEFINES";
    CHAVEOPENMP="#define OPENMP"
    FCOPT="$FCOPT $pac_cv_openmp_fcopt";
    CCOPT="$CCOPT $pac_cv_openmp_ccopt";