diff --git a/src/strings.cpp b/src/strings.cpp
index 32f2a297cf..0608fc12e1 100644
--- a/src/strings.cpp
+++ b/src/strings.cpp
@@ -400,74 +400,75 @@ static char *FormatGenericCurrency(char *buff, const CurrencySpec *spec, Money n
 	return buff;
 }
 
-static int DeterminePluralForm(int64 cnt)
+static int DeterminePluralForm(int64 count)
 {
-	uint64 n = cnt;
 	/* The absolute value determines plurality */
-	if (cnt < 0) n = -cnt;
+	uint64 n = abs(count);
 
 	switch (_langpack->plural_form) {
-	/* Two forms, singular used for one only
-	 * Used in:
-	 *   Danish, Dutch, English, German, Norwegian, Swedish, Estonian, Finnish,
-	 *   Greek, Hebrew, Italian, Portuguese, Spanish, Esperanto */
-	case 0:
-	default:
-		return n != 1;
+		default:
+			NOT_REACHED();
 
-	/* Only one form
-	 * Used in:
-	 *   Hungarian, Japanese, Korean, Turkish */
-	case 1:
-		return 0;
+		/* Two forms, singular used for one only
+		 * Used in:
+		 *   Danish, Dutch, English, German, Norwegian, Swedish, Estonian, Finnish,
+		 *   Greek, Hebrew, Italian, Portuguese, Spanish, Esperanto */
+		case 0:
+			return n != 1;
 
-	/* Two forms, singular used for zero and one
-	 * Used in:
-	 *   French, Brazilian Portuguese */
-	case 2:
-		return n > 1;
+		/* Only one form
+		 * Used in:
+		 *   Hungarian, Japanese, Korean, Turkish */
+		case 1:
+			return 0;
 
-	/* Three forms, special case for zero
-	 * Used in:
-	 *   Latvian */
-	case 3:
-		return n % 10 == 1 && n % 100 != 11 ? 0 : n != 0 ? 1 : 2;
+		/* Two forms, singular used for zero and one
+		 * Used in:
+		 *   French, Brazilian Portuguese */
+		case 2:
+			return n > 1;
 
-	/* Three forms, special case for one and two
-	 * Used in:
-	 *   Gaelige (Irish) */
-	case 4:
-		return n == 1 ? 0 : n == 2 ? 1 : 2;
+		/* Three forms, special case for zero
+		 * Used in:
+		 *   Latvian */
+		case 3:
+			return n % 10 == 1 && n % 100 != 11 ? 0 : n != 0 ? 1 : 2;
 
-	/* Three forms, special case for numbers ending in 1[2-9]
-	 * Used in:
-	 *   Lithuanian */
-	case 5:
-		return n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2;
+		/* Three forms, special case for one and two
+		 * Used in:
+		 *   Gaelige (Irish) */
+		case 4:
+			return n == 1 ? 0 : n == 2 ? 1 : 2;
 
-	/* Three forms, special cases for numbers ending in 1 and 2, 3, 4, except those ending in 1[1-4]
-	 * Used in:
-	 *   Croatian, Czech, Russian, Slovak, Ukrainian */
-	case 6:
-		return n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2;
+		/* Three forms, special case for numbers ending in 1[2-9]
+		 * Used in:
+		 *   Lithuanian */
+		case 5:
+			return n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2;
 
-	/* Three forms, special case for one and some numbers ending in 2, 3, or 4
-	 * Used in:
-	 *   Polish */
-	case 7:
-		return n == 1 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2;
+		/* Three forms, special cases for numbers ending in 1 and 2, 3, 4, except those ending in 1[1-4]
+		 * Used in:
+		 *   Croatian, Czech, Russian, Slovak, Ukrainian */
+		case 6:
+			return n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2;
 
-	/* Four forms, special case for one and all numbers ending in 02, 03, or 04
-	 * Used in:
-	 *   Slovenian */
-	case 8:
-		return n % 100 == 1 ? 0 : n % 100 == 2 ? 1 : n % 100 == 3 || n % 100 == 4 ? 2 : 3;
+		/* Three forms, special case for one and some numbers ending in 2, 3, or 4
+		 * Used in:
+		 *   Polish */
+		case 7:
+			return n == 1 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2;
 
-	/* Two forms; singular used for everything ending in 1 but not in 11.
-	 * Used in:
-	 *   Icelandic */
-	case 9:
-		return n % 10 == 1 && n % 100 != 11 ? 0 : 1;
+		/* Four forms, special case for one and all numbers ending in 02, 03, or 04
+		 * Used in:
+		 *   Slovenian */
+		case 8:
+			return n % 100 == 1 ? 0 : n % 100 == 2 ? 1 : n % 100 == 3 || n % 100 == 4 ? 2 : 3;
+
+		/* Two forms; singular used for everything ending in 1 but not in 11.
+		 * Used in:
+		 *   Icelandic */
+		case 9:
+			return n % 10 == 1 && n % 100 != 11 ? 0 : 1;
 	}
 }