diff --git a/src/BEDstruct.c b/src/BEDstruct.c
index 2e3b613..8082d90 100644
--- a/src/BEDstruct.c
+++ b/src/BEDstruct.c
@@ -504,7 +504,7 @@ void CalculateFPKM(BAMFILES *bhead, PEAK *head) {
     float kilo_length = 0;
 
     while (bcurr != NULL) {
-        pm = bcurr->read_coverage / 1000000;
+        pm = (float) bcurr->read_coverage / 1000000;
         curr = head;
 
         while (curr != NULL) {
@@ -651,4 +651,4 @@ void WriteMultiCovsNormalized(BAMFILES *bhead, PEAK *head, int no_of_samples, ch
 
     fclose(handler);
 
-}
\ No newline at end of file
+}