diff --git a/composeApp/src/commonMain/kotlin/mg/dot/feufaro/solfa/Solfa.kt b/composeApp/src/commonMain/kotlin/mg/dot/feufaro/solfa/Solfa.kt
index 75037b1..0913b90 100644
--- a/composeApp/src/commonMain/kotlin/mg/dot/feufaro/solfa/Solfa.kt
+++ b/composeApp/src/commonMain/kotlin/mg/dot/feufaro/solfa/Solfa.kt
@@ -2361,14 +2361,20 @@ class Solfa(val sharedScreenModel: SharedScreenModel, private val fileRepository
         }
         if ("c" == subKey) {
             val validKeys = Transpose.keyToNumber.sortedByDescending { it.length }
-            val keyRegex = Regex("\\b(${validKeys.joinToString("|")})\\b", RegexOption.IGNORE_CASE)
+            val keyRegex = Regex("\\b(${validKeys.joinToString("|")})(m)?\\b", RegexOption.IGNORE_CASE)
             val rawText = line.substringAfter("c:")
-            val matchedKey = keyRegex.find(rawText)?.value
-            val tonality = Transpose.keyToNumber.firstOrNull { it.equals(matchedKey, ignoreCase = true) }
-            if(tonality != null) {
-                meta["C"] = tonality
-                sharedScreenModel.setSongKey(tonality)
-                sharedScreenModel.setTransposeAsIf(tonality)
+            val matchResult = keyRegex.find(rawText)
+
+            if (matchResult != null) {
+                val rawBaseKey = matchResult.groupValues[1]
+                val hasMinor = matchResult.groupValues[2].isNotEmpty()
+                val baseTonality = Transpose.keyToNumber.firstOrNull { it.equals(rawBaseKey, ignoreCase = true) }
+                if (baseTonality != null) {
+                    val tonality = if (hasMinor) "${baseTonality}m" else baseTonality
+                    meta["C"] = tonality
+                    sharedScreenModel.setSongKey(tonality)
+                    sharedScreenModel.setTransposeAsIf(tonality)
+                }
             }
         }
     }