diff --git a/src/common/tpt-rand.cpp b/src/common/tpt-rand.cpp
index 84af99189..cb5155d89 100644
--- a/src/common/tpt-rand.cpp
+++ b/src/common/tpt-rand.cpp
@@ -38,11 +38,11 @@ int RNG::between(int lower, int upper)
 	return static_cast<int>(r % ((unsigned int)(upper) - (unsigned int)(lower) + 1U)) + lower;
 }
 
-bool RNG::chance(int nominator, unsigned int denominator)
+bool RNG::chance(int numerator, unsigned int denominator)
 {
-	if (nominator < 0)
+	if (numerator < 0)
 		return false;
-	return next() % denominator < static_cast<unsigned int>(nominator);
+	return next() % denominator < static_cast<unsigned int>(numerator);
 }
 
 float RNG::uniform01()
diff --git a/src/common/tpt-rand.h b/src/common/tpt-rand.h
index 9eb4ed29a..e71430a6c 100644
--- a/src/common/tpt-rand.h
+++ b/src/common/tpt-rand.h
@@ -15,7 +15,7 @@ public:
 	unsigned int operator()();
 	unsigned int gen();
 	int between(int lower, int upper);
-	bool chance(int nominator, unsigned int denominator);
+	bool chance(int numerator, unsigned int denominator);
 	float uniform01();
 
 	RNG();
diff --git a/src/simulation/elements/FUSE.cpp b/src/simulation/elements/FUSE.cpp
index 0c3a61ca1..51ac430de 100644
--- a/src/simulation/elements/FUSE.cpp
+++ b/src/simulation/elements/FUSE.cpp
@@ -59,7 +59,7 @@ static int update(UPDATE_FUNC_ARGS)
 	else if (parts[i].life < 40) {
 		parts[i].life--;
 		if (sim->rng.chance(1, 100)) {
-			auto r = sim->create_part(-1, x + sim->rng.chance(-1, 1), y + sim->rng.chance(-1, 1), PT_PLSM);
+			auto r = sim->create_part(-1, x + sim->rng.between(-1, 1), y + sim->rng.between(-1, 1), PT_PLSM);
 			if (r>-1)
 				parts[r].life = 50;
 		}