diff --git a/src/randomBed/randomBed.cpp b/src/randomBed/randomBed.cpp
index 72f50352c107f1a502e831d0dc5ae8282c9284a7..8eb7a13ad65fe21a765e8815a5efd75f4cf21340 100644
--- a/src/randomBed/randomBed.cpp
+++ b/src/randomBed/randomBed.cpp
@@ -58,7 +58,7 @@ void BedRandom::Generate()
             // we need to combine two consective calls to rand()
             // because RAND_MAX is 2^31 (2147483648), whereas
             // mammalian genomes are obviously much larger.
-            uint32_t randStart = ((rand() << 31) | rand()) % genomeSize;
+            uint32_t randStart = ((((long) rand()) << 31) | rand()) % genomeSize;
             // use the above randomStart (e.g., for human 0..3.1billion) 
             // to identify the chrom and start on that chrom.
             pair<string, int> location = _genome->projectOnGenome(randStart);
diff --git a/src/shuffleBed/shuffleBed.cpp b/src/shuffleBed/shuffleBed.cpp
index 5d72af4d6b0ade9e0e20c238615440ff272ed23e..8a3074985e9e5acdd7677c925edbef9db3dbe910 100644
--- a/src/shuffleBed/shuffleBed.cpp
+++ b/src/shuffleBed/shuffleBed.cpp
@@ -250,7 +250,7 @@ void BedShuffle::ChooseLocus(BED &bedEntry) {
             // we need to combine two consective calls to rand()
             // because RAND_MAX is 2^31 (2147483648), whereas
             // mammalian genomes are obviously much larger.
-            uint32_t randStart = ((rand() << 31) | rand()) % _genomeSize;
+            uint32_t randStart = ((((long) rand()) << 31) | rand()) % _genomeSize;
             // use the above randomStart (e.g., for human 0..3.1billion) 
             // to identify the chrom and start on that chrom.
             pair<string, int> location = _genome->projectOnGenome(randStart);
@@ -298,7 +298,7 @@ void BedShuffle::ChoosePairedLocus(BEDPE &b) {
         CHRPOS chromSize;
         do 
         {
-            uint32_t randStart = ((rand() << 31) | rand()) % _genomeSize;
+            uint32_t randStart = ((((long) rand()) << 31) | rand()) % _genomeSize;
             pair<string, int> location = _genome->projectOnGenome(randStart);
             b.chrom1  = location.first;
             b.chrom2  = location.first;
@@ -317,8 +317,8 @@ void BedShuffle::ChoosePairedLocus(BEDPE &b) {
         CHRPOS chromSize1, chromSize2;
         do 
         {
-            uint32_t rand1Start = ((rand() << 31) | rand()) % _genomeSize;
-            uint32_t rand2Start = ((rand() << 31) | rand()) % _genomeSize;
+            uint32_t rand1Start = ((((long) rand()) << 31) | rand()) % _genomeSize;
+            uint32_t rand2Start = ((((long) rand()) << 31) | rand()) % _genomeSize;
             pair<string, int> location1 = _genome->projectOnGenome(rand1Start);
             pair<string, int> location2 = _genome->projectOnGenome(rand2Start);