diff --git a/math/sqrt.c b/math/sqrt.c
index 9d2b077..83277e5 100644
--- a/math/sqrt.c
+++ b/math/sqrt.c
@@ -9,10 +9,28 @@ typedef union {
   } parts;
 } _dbl_cast;
 
+double _iexp2(int x) {
+  double result = 1.0;
+  if(x > 0) {
+    for(int i = 0; i < x; i++) {
+      result *= 2;
+    }
+  }
+  else if(x < 0) {
+    for(int i = 0; i > x; i--) {
+      result /= 2;
+    }
+  }
+  return result;
+}
+
+/*
+  First gets an initial estimate then refines it using the Bakhshali method
+*/
 double sqrt(double x) {
   _dbl_cast S = { .d = x };
   double estimate = (0.5 + 0.5 * S.parts.mantissa) *
-    exp2(S.parts.exponent - 1023);
+    _iexp2(S.parts.exponent - 1023);
 
   double a_n, b_n;