diff --git a/squiggle.c b/squiggle.c
index b148092..96288d6 100644
--- a/squiggle.c
+++ b/squiggle.c
@@ -35,11 +35,11 @@ uint64_t xorshift64(uint64_t* seed)
     // https://en.wikipedia.org/wiki/Xorshift
     // Also some drama: <https://www.pcg-random.org/posts/on-vignas-pcg-critique.html>, <https://prng.di.unimi.it/>
 
-		uint64_t x = *seed;
-		x ^= x << 13;
-		x ^= x >> 7;
-		x ^= x << 17;
-		return *seed = x;
+    uint64_t x = *seed;
+    x ^= x << 13;
+    x ^= x >> 7;
+    x ^= x << 17;
+    return *seed = x;
 }
 
 // Distribution & sampling functions
@@ -70,9 +70,9 @@ double sample_normal(double mean, double sigma, uint64_t* seed)
     return (mean + sigma * sample_unit_normal(seed));
 }
 
-double sample_lognormal(double logmean, double logsigma, uint64_t* seed)
+double sample_lognormal(double logmean, double logstd, uint64_t* seed)
 {
-    return expf(sample_normal(logmean, logsigma, seed));
+    return exp(sample_normal(logmean, logstd, seed));
 }
 
 double sample_to(double low, double high, uint64_t* seed)
@@ -84,8 +84,8 @@ double sample_to(double low, double high, uint64_t* seed)
     double loglow = logf(low);
     double loghigh = logf(high);
     double logmean = (loglow + loghigh) / 2;
-    double logsigma = (loghigh - loglow) / (2.0 * NORMAL95CONFIDENCE);
-    return sample_lognormal(logmean, logsigma, seed);
+    double logstd = (loghigh - loglow) / (2.0 * NORMAL95CONFIDENCE);
+    return sample_lognormal(logmean, logstd, seed);
 }
 
 double sample_gamma(double alpha, uint64_t* seed)
@@ -105,7 +105,7 @@ double sample_gamma(double alpha, uint64_t* seed)
                 v = 1.0 + c * x;
             } while (v <= 0.0);
 
-            v = v * v * v; 
+            v = v * v * v;
             u = sample_unit_uniform(seed);
             if (u < 1.0 - 0.0331 * (x * x * x * x)) { // Condition 1
                 // the 0.0331 doesn't inspire much confidence