diff --git a/maven-wrapper-distribution/src/resources/mvnw b/maven-wrapper-distribution/src/resources/mvnw
index df1a80ac..80a02256 100755
--- a/maven-wrapper-distribution/src/resources/mvnw
+++ b/maven-wrapper-distribution/src/resources/mvnw
@@ -225,6 +225,7 @@ else
     wrapperUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/@@project.version@@/maven-wrapper-@@project.version@@.jar"
   fi
   while IFS="=" read -r key value; do
+    key=$(trim "${key-}")
     case "$key" in wrapperUrl)
       wrapperUrl=$(trim "${value-}")
       break
@@ -281,6 +282,7 @@ fi
 # If specified, validate the SHA-256 sum of the Maven wrapper jar file
 wrapperSha256Sum=""
 while IFS="=" read -r key value; do
+  key=$(trim "${key-}")
   case "$key" in wrapperSha256Sum)
     wrapperSha256Sum=$(trim "${value-}")
     break
diff --git a/maven-wrapper-distribution/src/resources/only-mvnw b/maven-wrapper-distribution/src/resources/only-mvnw
index 6d8e3f8d..98025cde 100755
--- a/maven-wrapper-distribution/src/resources/only-mvnw
+++ b/maven-wrapper-distribution/src/resources/only-mvnw
@@ -110,6 +110,7 @@ scriptName="$(basename "$0")"
 
 # parse distributionUrl and optional distributionSha256Sum, requires .mvn/wrapper/maven-wrapper.properties
 while IFS="=" read -r key value; do
+  key=$(trim "${key-}")
   case "${key-}" in
   distributionUrl) distributionUrl=$(trim "${value-}") ;;
   distributionSha256Sum) distributionSha256Sum=$(trim "${value-}") ;;