diff --git a/jboss-logging.spec b/jboss-logging.spec
index 43cef1b..c1bb0fd 100644
--- a/jboss-logging.spec
+++ b/jboss-logging.spec
@@ -39,6 +39,10 @@ This package contains the API documentation for %{name}.
 
 %pom_xpath_set pom:properties/pom:version.org.apache.log4j 12
 
+# SLF4j 1.7 upgrade
+sed -i "s|map = MDC.getCopyOfContextMap();|map = (Map) MDC.getCopyOfContextMap();|" \
+ src/main/java/org/jboss/logging/Slf4jLoggerProvider.java
+
 # Unneeded task
 %pom_remove_plugin :maven-source-plugin