diff --git a/src/lib/exercises/src/hackerrank/projecteuler/euler001.c b/src/lib/exercises/src/hackerrank/projecteuler/euler001.c
index 7d10ab1..69c9cdc 100644
--- a/src/lib/exercises/src/hackerrank/projecteuler/euler001.c
+++ b/src/lib/exercises/src/hackerrank/projecteuler/euler001.c
@@ -39,7 +39,12 @@ unsigned long HACKERRANK_PROJECTEULER_euler001(int a, int b, int n) {
   // Since, we need the sum of multiples less than N
   n = n - 1;
 
-  unsigned long lcm = (a * b) / HACKERRANK_PROJECTEULER_gcd(a, b);
+  unsigned long gcd = HACKERRANK_PROJECTEULER_gcd(a, b);
+  if (gcd == 0) {
+    return 0;
+  }
+
+  unsigned long lcm = (a * b) / gcd;
 
   return HACKERRANK_PROJECTEULER_sum_of_arithmetic_progression(n, a) +
          HACKERRANK_PROJECTEULER_sum_of_arithmetic_progression(n, b) -
diff --git a/src/tests/unit/lib/hackerrank/projecteuler/euler001.testcases.json b/src/tests/unit/lib/hackerrank/projecteuler/euler001.testcases.json
index 2021998..11c84fb 100644
--- a/src/tests/unit/lib/hackerrank/projecteuler/euler001.testcases.json
+++ b/src/tests/unit/lib/hackerrank/projecteuler/euler001.testcases.json
@@ -1,4 +1,5 @@
 [
+  { "a": 0, "b": 0, "n": 0, "expected": 0 },  
   { "a": 3, "b": 5, "n": 10, "expected": 23 },
   { "a": 5, "b": 3, "n": 10, "expected": 23 },
   { "a": 3, "b": 5, "n": 100, "expected": 2318 },