diff --git a/cpp/liquid/src/ml_nextPrime.c b/cpp/liquid/src/ml_nextPrime.c
index 61a333f..8ffbc5c 100644
--- a/cpp/liquid/src/ml_nextPrime.c
+++ b/cpp/liquid/src/ml_nextPrime.c
@@ -1,8 +1,29 @@
 #include "math-lib.h"
 
+int isPrime(int a)
+{
+    for(int i=2;i<a;i++)
+    {
+	if(a%i==0)
+	{
+	 return 0; 
+	}
+    }
+    return 1;
+}
+
 int ml_nextPrime(int n1)
 // return the prime number >= n1
 {
+    int i=n1;
+    while(1)
+    {
+	if(isPrime(i))
+	{ return i;
+	  break;
+	}
+        i++;
+    }
     return 0;
 }