diff --git a/orte/mca/ras/slurm/ras_slurm_module.c b/orte/mca/ras/slurm/ras_slurm_module.c
index cce48890ff..8739005ced 100644
--- a/orte/mca/ras/slurm/ras_slurm_module.c
+++ b/orte/mca/ras/slurm/ras_slurm_module.c
@@ -330,6 +330,7 @@ static int parse_range(char *base, char *range, char ***names)
     
     len = strlen(range);
     base_len = strlen(base);
+    start = end = 0;
     
     /* Look for the beginning of the first number */
     
diff --git a/orte/mca/sds/slurm/sds_slurm_module.c b/orte/mca/sds/slurm/sds_slurm_module.c
index 044bd811ed..d186d67561 100644
--- a/orte/mca/sds/slurm/sds_slurm_module.c
+++ b/orte/mca/sds/slurm/sds_slurm_module.c
@@ -268,7 +268,8 @@ static int parse_range(char *base, char *range, char ***names)
     
     len = strlen(range);
     base_len = strlen(base);
-    
+    start = end = 0;
+
     /* Look for the beginning of the first number */
     
     for (found = false, i = 0; i < len; ++i) {