diff --git a/internal/protocols/httpp/content_type.go b/internal/protocols/httpp/content_type.go
new file mode 100644
index 00000000..002ce0dc
--- /dev/null
+++ b/internal/protocols/httpp/content_type.go
@@ -0,0 +1,8 @@
+package httpp
+
+import "strings"
+
+// ParseContentType parses a Content-Type header and returns the content type.
+func ParseContentType(v string) string {
+	return strings.TrimSpace(strings.Split(v, ";")[0])
+}
diff --git a/internal/protocols/webrtc/whip_client.go b/internal/protocols/webrtc/whip_client.go
index 9c9e6a64..95f35769 100644
--- a/internal/protocols/webrtc/whip_client.go
+++ b/internal/protocols/webrtc/whip_client.go
@@ -7,7 +7,6 @@ import (
 	"io"
 	"net/http"
 	"net/url"
-	"strings"
 	"time"
 
 	"github.com/bluenviron/gortsplib/v4/pkg/format"
@@ -15,6 +14,7 @@ import (
 	"github.com/pion/webrtc/v3"
 
 	"github.com/bluenviron/mediamtx/internal/logger"
+	"github.com/bluenviron/mediamtx/internal/protocols/httpp"
 )
 
 // WHIPClient is a WHIP client.
@@ -286,8 +286,8 @@ func (c *WHIPClient) postOffer(
 		return nil, fmt.Errorf("bad status code: %v", res.StatusCode)
 	}
 
-	contentType := res.Header.Get("Content-Type")
-	if strings.TrimSpace(strings.Split(contentType, ";")[0]) != "application/sdp" {
+	contentType := httpp.ParseContentType(req.Header.Get("Content-Type"))
+	if contentType != "application/sdp" {
 		return nil, fmt.Errorf("bad Content-Type: expected 'application/sdp', got '%s'", contentType)
 	}
 
diff --git a/internal/servers/webrtc/http_server.go b/internal/servers/webrtc/http_server.go
index 1824801a..fe9b1462 100644
--- a/internal/servers/webrtc/http_server.go
+++ b/internal/servers/webrtc/http_server.go
@@ -165,7 +165,8 @@ func (s *httpServer) onWHIPOptions(ctx *gin.Context, pathName string, publish bo
 }
 
 func (s *httpServer) onWHIPPost(ctx *gin.Context, pathName string, publish bool) {
-	if ctx.Request.Header.Get("Content-Type") != "application/sdp" {
+	contentType := httpp.ParseContentType(ctx.Request.Header.Get("Content-Type"))
+	if contentType != "application/sdp" {
 		writeError(ctx, http.StatusBadRequest, fmt.Errorf("invalid Content-Type"))
 		return
 	}
@@ -215,7 +216,8 @@ func (s *httpServer) onWHIPPatch(ctx *gin.Context, pathName string, rawSecret st
 		return
 	}
 
-	if ctx.Request.Header.Get("Content-Type") != "application/trickle-ice-sdpfrag" {
+	contentType := httpp.ParseContentType(ctx.Request.Header.Get("Content-Type"))
+	if contentType != "application/trickle-ice-sdpfrag" {
 		writeError(ctx, http.StatusBadRequest, fmt.Errorf("invalid Content-Type"))
 		return
 	}